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Number System || Finding Remainder ? (LESSON-4) — Transcript

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  1. 0:01first of all thanks for being here
  2. 0:04in my youtube channel so in this lesson
  3. 0:06number four
  4. 0:07on the topic number system now we are
  5. 0:10going to learn a concept called a
  6. 0:12reminder theorem
  7. 0:13so reminder theorem is nothing but to
  8. 0:15find a reminder of the number
  9. 0:17usually they will give some sort of
  10. 0:18question for example 23 power
  11. 0:215 divided by 5 so we have to solve the
  12. 0:24question we have to divide the numbers
  13. 0:26and we have to find the reminder for it
  14. 0:29right so those type of questions we are
  15. 0:31going to learn
  16. 0:32in this lesson number four so listen
  17. 0:34here friends lesson number three that is
  18. 0:36previous lesson
  19. 0:37is most important lesson finding a unit
  20. 0:40digit
  21. 0:40got it so this reminder theorem is a
  22. 0:43rare case right in the exams
  23. 0:45most of the competitive exams usually
  24. 0:47they will concentrate on the
  25. 0:49previous lesson unit digit but if you
  26. 0:52are preparing for
  27. 0:53cat exams or else a gate exams
  28. 0:56or else ssc exams those students should
  29. 0:59concentrate on this
  30. 1:00reminder theorem also so friends listen
  31. 1:03here
  32. 1:04this reminder theorem is subdivided into
  33. 1:07two categories
  34. 1:08one is finding a reminder for the normal
  35. 1:12numbers
  36. 1:13got it so normal numbers let me take 23
  37. 1:16by 5.
  38. 1:17so they usually give a question like
  39. 1:19this and our target is to find what is
  40. 1:21the reminder
  41. 1:22got it it's a normal numbers and the
  42. 1:24second will be
  43. 1:26a polynomial numbers polynomial numbers
  44. 1:29is nothing but for example
  45. 1:30x square plus 7 x plus 2 so this
  46. 1:33complete
  47. 1:34term should be divided by x square plus
  48. 1:362. so we have to find
  49. 1:38what is the reminder for this number so
  50. 1:42listen here if you are preparing for cat
  51. 1:45gate exams then preparing for any campus
  52. 1:48interview
  53. 1:49so those students should concentrate
  54. 1:51both the topics right you need to
  55. 1:53concentrate both the sections
  56. 1:54because in most of the cat exams they
  57. 1:56have asked a question from this area
  58. 1:58and most of the gate exams they have
  59. 2:00asked a question from this area the sse
  60. 2:02also
  61. 2:02got it so you have to concentrate both
  62. 2:05but if you are preparing for
  63. 2:07any state level competitive exams for
  64. 2:10example tamilnadu state level
  65. 2:12or big or state level competitive exams
  66. 2:14gujarat state level etc
  67. 2:16you have to concentrate 80 percentage on
  68. 2:18this topic
  69. 2:19and 20 percentage on this topic so got
  70. 2:21it so
  71. 2:23based on the exams what you are
  72. 2:25preparing you need to concentrate on
  73. 2:26this
  74. 2:27reminder theorem right so here in this
  75. 2:30video i am just going to teach you the
  76. 2:32normal numbers how to find the reminder
  77. 2:34for the normal numbers
  78. 2:35so in the next video i will be teaching
  79. 2:37how to find the reminder
  80. 2:39for the polynomial numbers right so
  81. 2:41friends listen here
  82. 2:42in this video we are going to solve 10
  83. 2:44question that is based on a normal
  84. 2:46numbers
  85. 2:47first and foremost is by seeing a
  86. 2:50question
  87. 2:51don't decide the question is tougher for
  88. 2:53example the question will be given like
  89. 2:55this
  90. 2:55517 power 5 17 divided by
  91. 2:595 just see here if you see the question
  92. 3:02like this 5
  93. 3:0217 power 5 17 we have to find
  94. 3:06the reminder for this question right by
  95. 3:09seeing the question don't decide the
  96. 3:11question is difficult
  97. 3:12again i am saying there are very simple
  98. 3:14logics to solve this question very easy
  99. 3:17it requires some practice if you
  100. 3:20practice those questions then solving
  101. 3:22all the tough level question based on
  102. 3:24this normal numbers will be easy
  103. 3:26but before that you have to buy out some
  104. 3:28of the numbers
  105. 3:292 power 1 is 2 2 square is 4
  106. 3:332 power 3 is 8 so till try to learn up
  107. 3:36to 2 power
  108. 3:375 got it so similarly 3 power 1 is 3
  109. 3:413 power 2 is 9 so similarly try to learn
  110. 3:44up to 3 power 5 it is
  111. 3:45enough these two numbers are more than
  112. 3:47enough to crack the question
  113. 3:49got reference so let me want to all the
  114. 3:52questions that is based on a normal
  115. 3:54numbers
  116. 3:58so initially let me go with five example
  117. 4:01questions right
  118. 4:02so first question 23 by 5 so we have to
  119. 4:05find
  120. 4:06what is the reminder for 23 by 5 so
  121. 4:09usually how will you find the reminder
  122. 4:11you will divide 23 by 5 times so no
  123. 4:14five fours are 20 so what about the
  124. 4:16reminder here three
  125. 4:17so we would say the answer for this
  126. 4:19question is three so the reminder is
  127. 4:21three
  128. 4:22every time in the exams you should not
  129. 4:24do like this
  130. 4:25it's completely waste of time right for
  131. 4:27those cases what you need to do is
  132. 4:29you try to directly cancel year itself
  133. 4:31in the mind calculations
  134. 4:33and try to find the reminder just see
  135. 4:35here how many times
  136. 4:365 into 4 is what 20 so what is the
  137. 4:39reminder that we have what is a balance
  138. 4:41number
  139. 4:42if 5 into 4 is 20 what will be the
  140. 4:44balance number is 3
  141. 4:45so we call 3 as a reminder got it or not
  142. 4:48right
  143. 4:48always try to find the reminder for all
  144. 4:51these types of numbers
  145. 4:52in the mind calculation do not do like
  146. 4:54this it's a schooling method you should
  147. 4:56not
  148. 4:57proceed in this way to solve all these
  149. 4:59questions right
  150. 5:00so let me take the second example 17
  151. 5:03divided by six
  152. 5:04so what is the reminder six threes are
  153. 5:0618
  154. 5:07but six twos are 12 yes or no 6 into 2
  155. 5:11times is what 12 so what is the reminder
  156. 5:13that we have is 5
  157. 5:15so 5 will be the reminder for this
  158. 5:18question
  159. 5:18so friends got it or not right so 6 into
  160. 5:202 is 12
  161. 5:22so 17 minus 12 is 5 so reminder is 5.
  162. 5:25so one important note never forget this
  163. 5:28note right
  164. 5:29so never and ever forget this note while
  165. 5:32solving the reminder theorem
  166. 5:34always after finding the reminder
  167. 5:37you have to check the reminder
  168. 5:40number the answer that we got reminder
  169. 5:43should be
  170. 5:43low when compared to this denominator
  171. 5:46number
  172. 5:47see for the first equation the reminder
  173. 5:48is 3 the denominator is 5
  174. 5:51always the reminder value should be low
  175. 5:53when compared to the denominator value
  176. 5:56similarly here we got the reminder 5 so
  177. 5:59the number 5
  178. 6:00is low when compared to 6 so we are
  179. 6:02saying that the reminder will be 5
  180. 6:05got it so let me move on to the third
  181. 6:07question just a third question
  182. 6:0986 into 23 divided by 11.
  183. 6:12so friends just listen here you don't
  184. 6:14want to multiply like some students what
  185. 6:16they usually do is
  186. 6:17they will multiply 86 into 20 then they
  187. 6:20would find the answer
  188. 6:21and then finally they would divide by
  189. 6:2311. don't do that it's a time waste
  190. 6:26what you need to do here is you need to
  191. 6:28divide
  192. 6:29all the individual numbers by 11. first
  193. 6:32divide 86 alone by 11 got it so how many
  194. 6:36times
  195. 6:368 times will be 88 7 times will be 77
  196. 6:40yes or no
  197. 6:4111 into 7 will be 77 got it so what is
  198. 6:45the reminder that we have
  199. 6:46if it is 77 6 7 8 9 so 9
  200. 6:50will be the reminder got it or not again
  201. 6:53divide 23
  202. 6:54by 11 2 times 11 into 2 is 22
  203. 6:57so we got a reminder as 1 so finally
  204. 7:019 into 1 will be 9 so 9
  205. 7:04is the reminder for the given number so
  206. 7:06friends understood or not how i am
  207. 7:08solving it right
  208. 7:09so you have to divide each and
  209. 7:12every number individually by 11. you
  210. 7:15don't want to multiply both the numbers
  211. 7:17it's a completely time waste i am just
  212. 7:19dividing 86 by 11 separately
  213. 7:2223 by 11 separately after finding the
  214. 7:25reminder i am multiplying both
  215. 7:27understood or not right so let me move
  216. 7:29on to question number four
  217. 7:3038 plus 71 plus 86
  218. 7:34listen here so first first you can
  219. 7:37either you can add all the numbers and
  220. 7:39then you can divide by 16
  221. 7:41you will get the answer or else what you
  222. 7:43can do is
  223. 7:44you can divide all the individual
  224. 7:46numbers by 16
  225. 7:48first divide 38 by 16 1 16 are 16
  226. 7:5216 2's are 32 16 3's are 48 but our
  227. 7:55target is 38 right so we can say that
  228. 7:5816 into 2 will be 32
  229. 8:01so 30 to 38 what is the reminder we have
  230. 8:046 is the reminder got it so similarly
  231. 8:0716 into 4 will be 64. so what is the
  232. 8:11reminder that we have is
  233. 8:127 got it so similarly 86 divided by 16
  234. 8:1716 fourths are 64. 16 5's are 80.
  235. 8:20so what is the reminder that we have a 6
  236. 8:23got it
  237. 8:23so finally i am dividing all the
  238. 8:26individual numbers
  239. 8:27by 16 38 by 16 71 by 16
  240. 8:3186 by 16 and finally i got all the
  241. 8:34reminders here first let me add the
  242. 8:35reminder
  243. 8:366 into 6 sorry 6 plus 6 will be 12
  244. 8:3912 7 will be 19
  245. 8:42you should not say 19 is the reminder
  246. 8:46why because just now i have told you
  247. 8:48keep that in mind never forget this note
  248. 8:50always after finding the reminder you
  249. 8:54have to check the reminder should be low
  250. 8:56when compared to the divisor that is by
  251. 8:59dividing the number right what we are
  252. 9:00going to divide see 19 is not low 19 is
  253. 9:04the highest number
  254. 9:05when compared to the divider right what
  255. 9:07you need to do is you need to again
  256. 9:09divide by 16
  257. 9:10if you divide by 16 1 16 are 16
  258. 9:14reminder will be 3 so finally the
  259. 9:17reminder for the question is 3
  260. 9:19friends understood or not right always
  261. 9:21remember that
  262. 9:22after finding the answer you need to
  263. 9:24check whether the reminder number is
  264. 9:27low when compared to the divisor got it
  265. 9:30if it is not low then you have to again
  266. 9:33divide by the divisor
  267. 9:34so divided by 16 so one times a reminder
  268. 9:37will be 3
  269. 9:38so finally 3 is the reminder got it now
  270. 9:41the reminder value is low when compared
  271. 9:43to the divisor
  272. 9:44so this is the way you have to solve the
  273. 9:46question so fifth question
  274. 9:48123 into 124 into 125.
  275. 9:52see multiplying if you start multiplying
  276. 9:55all the three numbers
  277. 9:56how much lengthy it is first you need to
  278. 9:58multiply 123 into 124
  279. 10:01after finding that answer you have to
  280. 10:02again multiply by 125
  281. 10:04so don't do that what should be a target
  282. 10:07you need to find
  283. 10:08what is the reminder for all the numbers
  284. 10:11individually
  285. 10:12so divide 123 by 9 right if you divide
  286. 10:15by 9
  287. 10:161 9's are nine so reminding us what
  288. 10:19three thirty three
  289. 10:20nine threes are 27 so reminder is what
  290. 10:24six so finally we can say that six will
  291. 10:27be the reminder for the first number
  292. 10:29for the second number seven will be the
  293. 10:31reminder for the third number eight will
  294. 10:32be the remainder got it
  295. 10:34because 123 6 then 124 will be 7
  296. 10:37125 will be 8. so totally the reminders
  297. 10:40are
  298. 10:416 into 7 into 8 divided by
  299. 10:44now what you need to do is you can
  300. 10:46multiply 6 into 7
  301. 10:48so 6 into 7 is 42 so 42
  302. 10:51into 8 by 9 got it so again for the
  303. 10:54individual numbers divided by 9
  304. 10:56if you divide 42 by 9 so
  305. 10:59nine fours are 36 so reminder will be
  306. 11:02six here so this will be the reminder
  307. 11:04so again we got six into eight divided
  308. 11:07by nine
  309. 11:08so eight six are 48 by nine got it
  310. 11:11so 9 into 5 will be 45
  311. 11:15so remaining will be 3 got it so finally
  312. 11:18we can say that
  313. 11:19answer for question number 5 is 3 so
  314. 11:22friends understood what i did
  315. 11:23so for every number individual numbers i
  316. 11:26am just finding the reminder reminder
  317. 11:28at last i'm fine finding the final
  318. 11:30reminder
  319. 11:31always remember that the final reminder
  320. 11:34value should be low when compared to the
  321. 11:36divisor
  322. 11:36right right so initially i found the
  323. 11:38reminder for 123 6.
  324. 11:41if you divide 123 by 9 reminder will be
  325. 11:436
  326. 11:44similarly for the next number is 7 for
  327. 11:46the last number is 8
  328. 11:47and then we have to multiply all the
  329. 11:49numbers so 6 initially i have first
  330. 11:51multiplied the 2 numbers 6 into 7 is 42
  331. 11:54so 42 remaining number is 8 divided by 9
  332. 11:57again for the individual number 42 i
  333. 12:00have divided by 9
  334. 12:01so reminder will be 6 so 6 into 8 again
  335. 12:0416 into 8 is 48
  336. 12:06right so 48 divided by 9 9 5's are 45
  337. 12:10so reminder will be 3 so 3 divided by 9.
  338. 12:13so finally we can say that
  339. 12:14we got a reminder 3 further you don't
  340. 12:17want to divide by 9
  341. 12:18why because 3 cannot be divided by 9 9
  342. 12:21but can be divided by 3 but 3 cannot be
  343. 12:23divided by 9
  344. 12:24so finally we can say that reminder for
  345. 12:26question number 5
  346. 12:27is 3 question number 6 so 7 power
  347. 12:315 divided by 4 so we have to find what
  348. 12:34is the reminder for this number
  349. 12:36see here if it is 7 square by 4 it is
  350. 12:38easy to find the answer
  351. 12:40because 7 square is 49 if it is 7 cube
  352. 12:43343 by 4 that is also easy but 7
  353. 12:46power 5 finding a number for 7 power 5
  354. 12:50is very much difficult
  355. 12:51so what you can do here is you can write
  356. 12:54this 7 power 5
  357. 12:55as 7 into 7 into 7 into 7
  358. 12:58got it divided by 4 got the logic or not
  359. 13:02now every individual number i am going
  360. 13:04to divide by 4
  361. 13:06if you divide 7 by 4 one fours are
  362. 13:094 reminding us what 3 so for every
  363. 13:12number
  364. 13:13we got a reminder 3 3 3
  365. 13:16and 3 friends got it or not so 3 into 3
  366. 13:20into 3 into 3 into 3 divided by 4
  367. 13:24according what i did so for every
  368. 13:26individual numbers for every individual
  369. 13:28number i am dividing by 4.
  370. 13:30if you divide 7 by 4 one force or 4
  371. 13:33reminder will be three
  372. 13:34so that's the thing i have written here
  373. 13:35right for first seven reminder three
  374. 13:37three three
  375. 13:38now what i can do here is i can multiply
  376. 13:40the first
  377. 13:41two numbers three into three is nine
  378. 13:43again three into three
  379. 13:45is nine got it so by four got the logic
  380. 13:48or not
  381. 13:49again i'm going to divide the individual
  382. 13:51number by four
  383. 13:52so how many times four twos are is what
  384. 13:54eight what is the reminder here
  385. 13:56one again four twos are eight reminder
  386. 13:59is one
  387. 14:00so one into 1 into 3 will be 3
  388. 14:03so finally we can say that the reminder
  389. 14:05for 7 power 5 divided by 4 is 3
  390. 14:08you don't want to divide 3 by 4 just now
  391. 14:11i have told you
  392. 14:12you need to find the reminder but
  393. 14:14remember one thing
  394. 14:15the reminder value should be low when
  395. 14:17compared to the denominator number
  396. 14:19never forget this right sometimes
  397. 14:21students will make a mistake that's
  398. 14:23that's the thing i'm repeatedly saying
  399. 14:24this
  400. 14:25always remember that after finding the
  401. 14:27reminder check one time with the divisor
  402. 14:30always the reminder value should be low
  403. 14:33when compared to the denominator number
  404. 14:34that is the division
  405. 14:36got it so finally we can say that three
  406. 14:38will be the reminder
  407. 14:39for question number six so friends got
  408. 14:41it or not right
  409. 14:42i'm just finding the reminder reminder
  410. 14:44reminder till i get the last reminder
  411. 14:47got it so this will be the answer for
  412. 14:49question number six
  413. 14:50so question number seven so 2 power 75
  414. 14:54divided by 5 so now we are entering into
  415. 14:56some difficult level question
  416. 14:58just here if it is 2 power 5 example i
  417. 15:01am saying if it is 2 power 5
  418. 15:03it is easy to write 2 into 2 into 2 into
  419. 15:052
  420. 15:06but here the number is 2 power 75
  421. 15:09we can't able to write like that right
  422. 15:11so what you need to do is just now i
  423. 15:13have told you
  424. 15:13initial stage of the video you have to
  425. 15:16buy out some of the numbers
  426. 15:172 power 1 is 2 2 square is 4 2
  427. 15:21cube is 8 so after biting all the
  428. 15:23numbers just listen carefully what i am
  429. 15:24going to do is
  430. 15:25i'm just going to uh just see i can
  431. 15:28write here 2 power 1 is what
  432. 15:302 square is 4 2 cube is 8
  433. 15:332 power 4 is 16 this year
  434. 15:365 under 16 i can mult 5 into 3 is what
  435. 15:4015 right so this 16 number right the
  436. 15:43number 16
  437. 15:44is most probably nearer to this 5
  438. 15:46multiples
  439. 15:47yes so now 5 into 3 is 15 so 2 power 4
  440. 15:51is 16 now i'm just going to
  441. 15:53convert the numerator value as just
  442. 15:55listen carefully
  443. 15:562 power 4 got it 2 power 4 right
  444. 16:00so divide this 75 by 4 if i divide 75 by
  445. 16:034
  446. 16:04so one fours are 4 so reminding us three
  447. 16:07right
  448. 16:0835 so 35 is eight fours are
  449. 16:1132 right so remaining is what three
  450. 16:14so this can be written as two power
  451. 16:16three divided by five
  452. 16:18so friends try to understand how i wrote
  453. 16:20this so if you
  454. 16:22understood this logic then solving all
  455. 16:25the questions will be easy
  456. 16:27got it how i write this initially they
  457. 16:29have given a number as 2 power 75
  458. 16:31right by seeing a denominator number is
  459. 16:345
  460. 16:34we already learned up to 2 power 5 in
  461. 16:37the initial stage of the video right
  462. 16:39so you have to check 5 multiples which
  463. 16:41number here right you can take 5
  464. 16:43multiples of 16 why because
  465. 16:44it is little bit nearer number 5 into 3
  466. 16:47is 15
  467. 16:48so i can take 16 here nearer number so i
  468. 16:51am just going to convert this 2 power 75
  469. 16:54as 2 power 4 because 2 power 4 is 16
  470. 16:57so 2 power 4 power 18 into 2 power 3
  471. 17:01so 18 into 4 2 power 3 if you add both
  472. 17:04the numbers you will get 2 power 75
  473. 17:07now what i can do is this 2 power 4 can
  474. 17:09be written as 16 power
  475. 17:1118 into 2 cube will be 8
  476. 17:14divided by 5 got it because 2 power 4 is
  477. 17:1716
  478. 17:18right so power 18 asset is 2 cube is 8.
  479. 17:22now just here for individual number this
  480. 17:24individual number alone
  481. 17:26i am going to divide by 5. so 1 5's are
  482. 17:295
  483. 17:29phi 3s are what 15 reminder is what 1
  484. 17:33so 1 power 18 into 8 divided by 5
  485. 17:37understood or not
  486. 17:38right what i did 16 power 18 got it
  487. 17:41for this individual number 16 alone i'm
  488. 17:43going to divide by 5
  489. 17:4516 by 5 will be 3 times 5 into 3 is 15
  490. 17:49so reminder is what 1 so 1 power 18 into
  491. 17:528 by 5
  492. 17:531 power 18 so 1 power any number will be
  493. 17:56always 1
  494. 17:57so this can be written as 8 divided by 5
  495. 18:00you should not stop here
  496. 18:02why because i have just told you the
  497. 18:03remainder value should be low when
  498. 18:05compared to the divisor
  499. 18:06so again 1 5s are 5 so reminding us what
  500. 18:103 so 3 will be the reminder for this
  501. 18:13question
  502. 18:14so friends understood or not how i did
  503. 18:16this if you can't able to understand it
  504. 18:18again start watching from the first
  505. 18:20stage of the video and for complete uh
  506. 18:22solving this question
  507. 18:24this step alone is important by just
  508. 18:27watching
  509. 18:28one question you can't able to
  510. 18:29understand it it requires more practice
  511. 18:32again i am saying
  512. 18:33take your books practice 10 or 20
  513. 18:35questions
  514. 18:36automatically you know how to write like
  515. 18:38that got it
  516. 18:39so first 2 power 4 is 16 right some
  517. 18:42students will ask why i can't able to
  518. 18:44take 2 power 8 can i take 2 power 3
  519. 18:46yes you can you will get the same answer
  520. 18:48but always remember that
  521. 18:50try to take the divisor nearby multiples
  522. 18:53only then it is easy to solve the
  523. 18:55question
  524. 18:56so 5 3 will be 15 so only i have take 2
  525. 18:58power 4
  526. 18:59right so 2 power 4 i have just divided
  527. 19:0175 by 4
  528. 19:02is 18 remainder is 3 got it so i have
  529. 19:05written as 18 here
  530. 19:06the reminder 3 has 2 power 3. so now if
  531. 19:09you add
  532. 19:1018 into 4 and then 2 power 3 you will
  533. 19:12get 75
  534. 19:13okay so finally answer for question
  535. 19:16number 7 where the reminder is 3
  536. 19:18question number 8 so just see the
  537. 19:20question number 8 7 power 129 divided by
  538. 19:235
  539. 19:24so we have to find the remainder so from
  540. 19:26just here
  541. 19:277 power 129 it is not easy to write 7
  542. 19:30into 7 into 7
  543. 19:31so we have to use certain tricks to
  544. 19:33solve this question
  545. 19:34just listen carefully first what i can
  546. 19:36do is in the previous question the
  547. 19:38numerator is 2
  548. 19:39so we can easily write down as 2 power 4
  549. 19:41something but here the numerator is 7
  550. 19:43so what you need to do is just take the
  551. 19:46number 7 alone just
  552. 19:47listen carefully just take the number 7
  553. 19:50alone right
  554. 19:51not the power 129 i am just taking the
  555. 19:53number 7 alone
  556. 19:547 individual number divided by 5 so 1
  557. 19:575's are 5 reminding us what 2 so the
  558. 20:00remainder is 2 so
  559. 20:022 power 129 2 power 129 divided by
  560. 20:075 so friends understood this step or not
  561. 20:09how i wrote this
  562. 20:11i am just dividing the individual number
  563. 20:137 alone by 5
  564. 20:157 by 5 1 5 5 the remainder will be 2
  565. 20:19so now i write this complete number as 2
  566. 20:21power 1 29 by 5 right
  567. 20:23so 2 power 129 by 5
  568. 20:26now it is easy to convert the numbers
  569. 20:28because just now we have learned 2 power
  570. 20:304 is what
  571. 20:3116 nearby multiples got it two power
  572. 20:34four so divide completely by four
  573. 20:36so four threes are twelve so four twos
  574. 20:39are eight
  575. 20:40so reminder will be one so this can be
  576. 20:42written as thirty two
  577. 20:43got it reminder one can be written as
  578. 20:45two power one by five
  579. 20:46that's it now it is easy or not how i
  580. 20:48wrote this initially
  581. 20:50i have found the reminder for 7 by 5
  582. 20:52that is 2
  583. 20:53so 2 power 129 by 5 just now we have
  584. 20:57learnt
  585. 20:57we have to check the 5 multiples 5 3's
  586. 21:00are 15
  587. 21:01so we can write the numerator 2 power 4
  588. 21:03as 16
  589. 21:04so 2 power 4 right divide 129 by 4
  590. 21:08so it is 32 reminder 1 i am writing as 2
  591. 21:11power 1
  592. 21:12if we got reminder 2 2 power 2 if we got
  593. 21:14reminder 9 2 power 9
  594. 21:16got it or not right so now we can say 2
  595. 21:19power 4 is what 16
  596. 21:20so 16 power 32 into 2
  597. 21:24divided by 5 so now cancel it 1 5's are
  598. 21:275 how many table how many times
  599. 21:295 3 is a 15 reminder is what 1
  600. 21:321 power 32 is always 1 so the complete
  601. 21:35for this number the
  602. 21:37reminder will be 1 so this can written
  603. 21:39as so finally we have only number 2
  604. 21:42so this will be the reminder because the
  605. 21:44number 2 is
  606. 21:45low when compared to the divisor so we
  607. 21:47can say that 2 will be the reminder
  608. 21:49how easy it is first question alone
  609. 21:52previous question alone it will be
  610. 21:53little bit difficult
  611. 21:54but see how easily we have solved this
  612. 21:56question so only
  613. 21:57important area is this area got it and
  614. 22:00then you have to understood this concept
  615. 22:02you have to understand this concept
  616. 22:03right
  617. 22:04just see here 16 power 32 we can cancel
  618. 22:07it 5
  619. 22:083s are 15 so what about the reminder
  620. 22:10will be 1 is the reminder
  621. 22:121 power 32 so 1 power anything will
  622. 22:14always be 1
  623. 22:15so 1 into 2 will be 2 you don't want to
  624. 22:17divide by 5
  625. 22:18why because we got a reminder which is
  626. 22:20low very less number
  627. 22:22when compared to the divisor so
  628. 22:23definitely 2 will be the reminder
  629. 22:26for question number eight question
  630. 22:28number nine
  631. 22:29so question number nine is 517
  632. 22:32power 517 divided by five
  633. 22:36just see here by seeing the question
  634. 22:37again this is
  635. 22:39according to me it's very small question
  636. 22:40the exams they usually ask 517 power 517
  637. 22:44into 2300 etc so by seeing the question
  638. 22:48do not decide it is difficult
  639. 22:49it is always easy if you know the logic
  640. 22:52what is the first step you have to do
  641. 22:54you have to divide this individual
  642. 22:56number 5 17
  643. 22:57alone by 5 let me divide this 1 5s are 5
  644. 23:01right 0 phi 3s are 15. what about the
  645. 23:05reminder that we have is 2.
  646. 23:06so totally we got a reminder that is 2
  647. 23:105 17 by 5 understood or not how i wrote
  648. 23:13this
  649. 23:14i am just dividing this individual
  650. 23:16number 5 17 by 5
  651. 23:18if i divide 5 17 by 5 we got a reminder
  652. 23:212
  653. 23:22so this complete number we can write
  654. 23:24this as 2 power 5
  655. 23:2517 divided by 5 now just look at the
  656. 23:29denominator what about the denominator
  657. 23:30here 5
  658. 23:31so the numerator is 2 convert in terms
  659. 23:34of
  660. 23:345 multiples so you can write this as
  661. 23:36what 2 power 4 just now i have told you
  662. 23:392 power 4 is 16 multiplied by multiples
  663. 23:42of 5 right
  664. 23:43so divide by 4 so what about the one
  665. 23:46force of 4
  666. 23:46right so remaining will be 1 again four
  667. 23:50twos are eight
  668. 23:51so remaining will be three that is
  669. 23:53thirty seven
  670. 23:55eight fours are nine fours are 36
  671. 23:58remainder will be one so 129
  672. 24:00so reminder we got to 1 that is 2 power
  673. 24:021 by 5 understood or not
  674. 24:04right i am dividing 5 17 by 4 we got 129
  675. 24:08and the remainder 1. so i have written
  676. 24:09129 here
  677. 24:11and reminder as 2 power 1 quarter so now
  678. 24:13we know the 2 power 16 2 power 4 is 16
  679. 24:16when you cancel 5 and 16 remainder will
  680. 24:19be 1
  681. 24:19so 1 power 129 always it will be 1 so
  682. 24:22finally we got 1 into 2 by 5
  683. 24:25so 1 into 2 will be 2 so 2 will be the
  684. 24:28reminder quad it or not see how easy it
  685. 24:30is
  686. 24:30the question looks little bit uh by by
  687. 24:33seeing the question we
  688. 24:34we feel that it's difficult but just see
  689. 24:36here how easy it is
  690. 24:38it comes only in practice right so
  691. 24:40answer for question number nine where
  692. 24:42the reminder is two
  693. 24:44so last 10th question so what is the
  694. 24:47reminder
  695. 24:47when 2 2 4 3 power 165 2 2 4
  696. 24:513 power 165 is divided by 4 usually in
  697. 24:55the exams they will ask
  698. 24:56question like this so we need to write
  699. 24:58like this and then we have to find the
  700. 24:59reminder
  701. 25:00just see here 2 2 4 3 power 165
  702. 25:03divided by 5 so our target is to find
  703. 25:06what is the reminder
  704. 25:07so what what is the first step you need
  705. 25:09to do you have to divide this individual
  706. 25:11number alone by five
  707. 25:13let me divide this five fours are what
  708. 25:1520 so reminder is 24
  709. 25:18again five fours are 20 reminder is 443
  710. 25:21eight fives are 40 remainder will be 3
  711. 25:24so this can be written as 3 power 165
  712. 25:27divided by got it or not and all the
  713. 25:29previous question we got the reminder
  714. 25:31two but in this question we got a
  715. 25:33reminder three don't worry about it
  716. 25:34sometimes you will get
  717. 25:35a reminder four or reminder eight
  718. 25:37whatever be
  719. 25:38you have to write reminder three power
  720. 25:40one 165 the next
  721. 25:42step just listen here just now i have
  722. 25:44told you right you need to check the
  723. 25:46nearby multiples of 5 only then you can
  724. 25:49convert the number just here
  725. 25:51what is 3 power 1 3 power 1 is 3 3
  726. 25:54square
  727. 25:55is what 9 got it it's not nearer to the
  728. 25:57multiples of 5
  729. 25:59got it so 3 part 3 is 27 again not the
  730. 26:02nearby multiples
  731. 26:043 power 4 is what 81 yes or no
  732. 26:073 power 4 is 81 got it
  733. 26:10which is a nearby multiples of 5 because
  734. 26:1316 into 5 will be 80 so here you can see
  735. 26:163 power 4 is 81 so we can take 3 power 4
  736. 26:20so now i am going to convert this as 3
  737. 26:22power 4
  738. 26:24so divide this by 4 if you divide by 4
  739. 26:26it is 41
  740. 26:27so reminder will be 1 so 3 power 1 by 5
  741. 26:30got it or not how i wrote this
  742. 26:32so 3 power 4 if you divide 165 by 4 we
  743. 26:36got 41 and reminder 1
  744. 26:38i have written 41 here and the remainder
  745. 26:401 year so now we need to divide by 5
  746. 26:42just listen here 3 power 4 is what 81
  747. 26:45yes or no
  748. 26:46so 81 power 41 into 3
  749. 26:50divided by 5 so if you cancel 81 by 5
  750. 26:54right 16 5s are 80. so reminder is 1
  751. 26:581 power 41 anything just now i have told
  752. 27:01you one power
  753. 27:02any number will be always one so for
  754. 27:04this complete number the remainder will
  755. 27:06be 1
  756. 27:07so 1 into 3 will be 3. so finally answer
  757. 27:10for this question where the reminder is
  758. 27:123
  759. 27:13just see every question have a certain
  760. 27:15logics
  761. 27:16if you use that logic solving a question
  762. 27:19is easy
  763. 27:20i have told you the logic first unit
  764. 27:21what you need to do you have to divide
  765. 27:23the individual number by the divisor
  766. 27:26right either not every time it won't be
  767. 27:28five sometimes it won't be six
  768. 27:30or seven or eight whatever b but you
  769. 27:32have to divide by that number and you
  770. 27:34need to find the reminder
  771. 27:36after finding the reminder you have to
  772. 27:38check the nearby multiples of the
  773. 27:40divisor
  774. 27:41so here i have taken 3 power 4 why
  775. 27:43because 3 power 4 is 81
  776. 27:45where 16 into 5 is 80 so 80 81 is a
  777. 27:48nearer number
  778. 27:49so i have taken 3 power 4 divided by 4
  779. 27:5241 and reminder 1
  780. 27:54so just now i have told you 3 power 4 is
  781. 27:5681 if you divide 81 by 5 reminder will
  782. 27:59be 1
  783. 27:591 power any number will always be 1. so
  784. 28:02for this complete number the reminder is
  785. 28:041
  786. 28:05and the remaining number that we have is
  787. 28:063 power 1 is 3 so finally we can say
  788. 28:09that the reminder is 3
  789. 28:11so hence that's it about this video so
  790. 28:13again i just want to say one thing
  791. 28:15listen here it requires a lot a lot of
  792. 28:18practice
  793. 28:19just by watching this video you can't
  794. 28:21able to solve the question in the exams
  795. 28:23you have to take your books after
  796. 28:25watching video after understanding the
  797. 28:27concepts
  798. 28:28take your books or search in a google
  799. 28:30you will get more than 100 200 questions
  800. 28:33try to solve all the questions right so
  801. 28:36some students will
  802. 28:37solve in a minus terms for example they
  803. 28:39usually write like this minus 3 per 4
  804. 28:42right in most of the foreign other books
  805. 28:44or a local author books you can able to
  806. 28:46see
  807. 28:46my they usually convert in some numbers
  808. 28:48they convert in terms of
  809. 28:50minus it is not required right either
  810. 28:53you
  811. 28:54convert into minus you are going to get
  812. 28:55the same answer if you convert into a
  813. 28:57positive value you are going to say
  814. 28:59get the same answer always try to learn
  815. 29:01any one method right don't learn both
  816. 29:03the methods
  817. 29:04both the methods will be confusing
  818. 29:05that's the reason i have converted all
  819. 29:07the numbers in terms of positive value
  820. 29:09right
  821. 29:10got it so just some students will ask me
  822. 29:13this doubt
  823. 29:14some books they have written in terms of
  824. 29:16minus so don't get confused
  825. 29:18all the questions use the same logic you
  826. 29:20will surely get the answer
  827. 29:22so thank you so much for watching this
  828. 29:24video so if you really like it
  829. 29:26share the video to your friends those
  830. 29:27are preparing for the competitive exams
  831. 29:30so thank you so much for watching it bye

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