Number System || Introduction (LESSON-1) — Transcript

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1. 0:05first of all thanks for being here in my
2. 0:08YouTube channel so in this lesson number
3. 0:10one on the topic number system now we
4. 0:13are going to learn introduction about it
5. 0:16so before solving a question on the
6. 0:17topic number system first in this video
7. 0:19we can learn some of the important
8. 0:21points to remember right so listen here
9. 0:23if you take a number system quantitative
10. 0:26aptitude topic it is very easy if you
11. 0:28are going for any competative exams even
12. 0:31if you're are going for a campus
13. 0:32interview you can able to see minimum of
14. 0:35one question from this topic number
15. 0:37system and maximum two or three question
16. 0:40and listen here why I am saying this
17. 0:41number system topic is easy because it
18. 0:44does not have any formulas to solve you
19. 0:46just have to read the question twice or
20. 0:49Thrice you have to understand the
21. 0:51question and then you can solve by your
22. 0:53own way right because these are the
23. 0:55questions does not requir any formula to
24. 0:57solve you just have to understand the
25. 0:59question
26. 1:00but understanding a question right only
27. 1:03if you know some of the important points
28. 1:06what is called as prime number what is
29. 1:08called as divisibility rule integer
30. 1:12rational numbers irrational numbers
31. 1:14divisibility rule so these concepts are
32. 1:18important before solving all those
33. 1:20question you have to learn all these
34. 1:22Concepts right only if you know the
35. 1:24basics of number system you can able to
36. 1:27solve the question right so listen here
37. 1:29here in this video I'm just going to
38. 1:31teach you uh the easiest way to learn
39. 1:34I'm just going to draw a chart here so
40. 1:37that you can able to learn all the
41. 1:39concepts easily by only the chart so now
42. 1:42let we move on to the chart that is
43. 1:44based on number system so friends listen
44. 1:46here instead of spending more number of
45. 1:48time on biting the concepts better you
46. 1:51can understand this chart what I'm going
47. 1:53to teach now if you understand this
48. 1:55chart then you can save more number of
49. 1:57time instead of biting it it is easy
50. 1:59right just see here first let me take
51. 2:02numbers so numbers is basically
52. 2:05separated into two categories so
53. 2:08category number one will be real numbers
54. 2:11got it category number two is imaginary
55. 2:15numbers so numbers are separated into
56. 2:17two parts one is a real number and the
57. 2:20second is the imaginary number so first
58. 2:22you need to know what is called as real
59. 2:24number and what is called as imaginary
60. 2:26numbers just see here numbers let me
61. 2:29take example 4 + 3 I got it 4 + 3 a here
62. 2:354 is a normal number which is called as
63. 2:37a real number imagine imaginary number
64. 2:41is like whenever you can able to see
65. 2:43that letter I sometimes you can able to
66. 2:46see root of I root of I is minus one so
67. 2:49these cases is called as imaginary
68. 2:51numbers if a number contains a letter I
69. 2:54is called as an imaginary numbers if a
70. 2:57normal number is called as a real
71. 2:59numbers just see here we are preparing
72. 3:02for competive exams in the compettive
73. 3:04exams
74. 3:0599% imaginary number questions will not
75. 3:09be asked only if you are preparing for
76. 3:119th standard 10th standard or
77. 3:13engineering mathematics there we can
78. 3:15able to see more number of questions on
79. 3:17imaginary but in quantitative aptitude
80. 3:20you don't want to learn this imaginary
81. 3:22number Concepts right you can
82. 3:24concentrate only on the real numbers got
83. 3:27it second this real number is
84. 3:30categorized into two parts one is
85. 3:34irrational numbers got it and the second
86. 3:37is the rational
87. 3:40numbers rational numbers and irrational
88. 3:44numbers so let me understand what is
89. 3:46called as a rational number and what is
90. 3:49irrational number just see here what is
91. 3:51root of 9 root of 9 is three yes or no
92. 3:55what is root of two root of two will be
93. 3:591 Point
94. 4:00414 213 5 6 it goes on yes or no when
95. 4:06you look at the calculator just check
96. 4:07the calculator what is square root of
97. 4:09two if you find what is square root of
98. 4:12two we have learned only
99. 4:141.414 but actually the square root of 2
100. 4:17is 1.414 21356 it goes on it does not
101. 4:22have an any end so these cases are
102. 4:25called as irrational numbers so got it
103. 4:28only if it is a root 9 is 3 right this
104. 4:31number has an end but this number does
105. 4:33not has an end so if a number that does
106. 4:36not has an any end is called as
107. 4:38irrational numbers for example < tk2 <
108. 4:42tk3 so these are the numbers yes or no <
109. 4:45tk2 < tk3 these are the numbers does not
110. 4:48have any end after the decimal point so
111. 4:50these numbers are called as irrational
112. 4:52numbers right so these are the small
113. 4:54small numbers for example a root of 144
114. 4:57is 12 yes or no and normal number three
115. 5:00normal number four it has an end so
116. 5:03these numbers are called as a rational
117. 5:05numbers understood so now we have
118. 5:07learned what is called as numbers how it
119. 5:09is separated into two types so in the
120. 5:12real numbers we have two type one is
121. 5:14called as a rational numbers and the
122. 5:16second is called as irrational numbers
123. 5:18got it next this rational numbers are
124. 5:22separated into two parts see one is the
125. 5:27integer and second is the
126. 5:30fraction it is easy what is called as an
127. 5:33integer integer is a normal numbers for
128. 5:36example 1 2 3 4 this is called as an
129. 5:39integer fraction it is easy right so 1X
130. 5:423 3x 7 no fraction numbers just a
131. 5:46fraction numbers got it so this rational
132. 5:48numbers are separated into two
133. 5:50categories one is a normal integer and
134. 5:54the second is the fraction numbers if
135. 5:56you take this integer this integer is a
136. 5:59separated into for example positive
137. 6:03integer negative integer and a number
138. 6:06zero see positive integer is nothing but
139. 6:101 comma 2 comma 3A 4 till n is called as
140. 6:13an positive integer negative integer is
141. 6:17-1a -2 -3 -4 it goes on till Min - n it
142. 6:22is called as a negative integer zero is
143. 6:25a normal number starting number zero
144. 6:27right so this is a zero so this in
145. 6:29integer is separated into three
146. 6:31categories positive integer negative
147. 6:34integer and then a zeros got it so now
148. 6:37let me take this positive integer
149. 6:39positive integer is what 1 2 3 4 so this
150. 6:42positive integer is categorized into two
151. 6:45parts one is the natural numbers second
152. 6:49is the whole number everyone knows it
153. 6:52what is called as natural numbers and
154. 6:54numbers that start from 1 1A 2 comma 3A
155. 6:574 until n it is called as natural
156. 7:01numbers what is called as old number a
157. 7:03same set of series if it start from zero
158. 7:070a 1 comma 2 comma 3A 4 until n it is
159. 7:11called as a old numbers so friends got
160. 7:14it just here integer is separated into
161. 7:17sub it subdivided into three parts
162. 7:19positive integer negative integer and a
163. 7:22zero you know what is called as integer
164. 7:24integer is just a normal number 1A 2
165. 7:27comma 4 comma n so we have integer two
166. 7:31type positive integer negative integer
167. 7:33and a number zero so if you take a
168. 7:35positive integer that can be separated
169. 7:37into a natural number and a whole number
170. 7:41natural number is nothing like a series
171. 7:43that start from one is called as natural
172. 7:45number if a series that start from zero
173. 7:48is called as a whole number got it the
174. 7:50last step this natural number is
175. 7:53separated into four important there are
176. 7:56many parts but I'm teaching you only
177. 7:58four important parts that are important
178. 8:00for competitive exams so 1A 2 comma 3A 4
179. 8:04till n how you can separate this even
180. 8:07numbers yes even numbers 2 4 6 8 even
181. 8:11numbers second will be odd numbers third
182. 8:15will be prime numbers yes or no what is
183. 8:17called as prime number 3 5 7 those cases
184. 8:20are called as prime numbers and the last
185. 8:23is the composite number you should know
186. 8:26what is called as composite number
187. 8:28composite number is number which have
188. 8:31more than two factors for example let me
189. 8:34take number 15 how many factors we have
190. 8:375 into 3 will be 15 1 Factor 3 into 5
191. 8:41will be 15 1 into 15 will be 15 15 into
192. 8:451 will be 15 so if a number which has
193. 8:48more than two factor is called as a
194. 8:51composite number that's it right just
195. 8:54see how easily we have categorized the
196. 8:56number system and now without Bing it it
197. 8:59is easy to understand the entire concept
198. 9:03again I'm saying there are more
199. 9:04important points other than this but I'm
200. 9:07teaching only for the exam point of view
201. 9:09right for the exam competitive exam
202. 9:11point of view can teach you again one
203. 9:12time see first numbers numbers are
204. 9:15separated into two category one is a
205. 9:17real number and second is the imaginary
206. 9:20numbers so real number is the normal
207. 9:22numbers imaginary number is the number
208. 9:24that contains I letter I is called as
209. 9:27imaginary numbers so you don't want to
210. 9:29concentrate on more on imaginary numbers
211. 9:31because only if we preparing for school
212. 9:34colleges those cases we have to learn
213. 9:36this imaginary numbers for the
214. 9:38competitive exams quantitative aptitude
215. 9:41so this real number is more than enough
216. 9:43second the real number is categorized
217. 9:45into two parts one is a rational number
218. 9:48and a irrational number I have told you
219. 9:51what is the difference between
220. 9:52irrational numbers and the rational
221. 9:54numbers if a number that does not have
222. 9:56an end it is called as irrational number
223. 9:59example square root of two if you find
224. 10:01what is the value of square root of 2
225. 10:031.414 213 56 it goes on right so those
226. 10:07cases is called as an irrational numbers
227. 10:10so rational number is like normal number
228. 10:12root of 9 3 4 5 Etc got it so now this
229. 10:17rational numbers are separated into two
230. 10:19category one is a normal integer and
231. 10:23second is the fraction fraction everyone
232. 10:25knows 1X 3 2x 7 the number as numerator
233. 10:29as well as a denominator is called as a
234. 10:31fraction got it and integer so integer
235. 10:35are separated into positive integer
236. 10:37negative integer and a number zero so
237. 10:40positive integer is nothing but 1A 2
238. 10:42comma 3 negative integer -1 - 2 - 3 and
239. 10:46the last is zero right number zero now
240. 10:49this positive integer is separated into
241. 10:51two categories a series that start from
242. 10:54one is called as a natural number a
243. 10:56series that starts with 0 1A 2 3 is
244. 10:59called as a old number at the last this
245. 11:02natural number is separated into four
246. 11:04important parts even number odd number
247. 11:08prime number composite number you know
248. 11:11what is called as even number 2 comma 4
249. 11:13comma 6 what is called as odd number 1
250. 11:15comma 3 comma 5 what is called as prime
251. 11:18number 357 right and what is called as
252. 11:20composite number a number which has more
253. 11:23than two
254. 11:25factors got it is called as a composite
255. 11:28numbers so it is enough friends in this
256. 11:30video it is more than enough so in the
257. 11:32next video we can learn some of the
258. 11:34basics and we can start solving the
259. 11:36questions so many students usually sit
260. 11:38and buyart all these stuffs don't buyart
261. 11:40it now it is easy right so just take
262. 11:42down this as a note and you know if
263. 11:44you're preparing for competitive exams
264. 11:46just take a note of it start learning
265. 11:48all the concepts here what is called as
266. 11:50irrational numbers just take some
267. 11:52examples and see so that number system
268. 11:54will be very easy so thank you so much
269. 11:57for watching this video so if you really
270. 11:59like it share the video to your friends
271. 12:01those who are preparing for the
272. 12:02competitive exams so in the next lesson
273. 12:04we can learn some more Concepts and we
274. 12:06can start solving a question so thank
275. 12:08you so much for watching it bye