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Chapter 1: Types of Numbers
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In this chapter, Binati has discussed various types of numbers and the corresponding names associated to these numbers.

Binati Sheth
An Avid Reader. A Teacher. An Aid worker. An Engineer (E&C). A Writer. Budding Art Connoisseur. A philomath. A Shōnen Otaku.

U
Unacademy user
Please make more video on quantitative ability...
Binati Sheth
2 years ago
Yes I am currently working on it. Thank you for the encouragement. Happy learning:)
Pardip modi
a year ago
yaa mam pls make it more for xat preparation exam
Pardip modi
a year ago
mam can i get ur email ya whatup where i contact you for the classes
Binati Sheth
a year ago
I don't conduct plus courses. All my courses are available on my bio - 73 courses to date. Just browse through. I am currently preparing a few other courses on Quant and LR.
  1. I am Binati Sheth Let's get our calculative streak on You can find me at @binati157


  2. ABOUT ME Educator at UnAcademy Aide worker Writer Teacher Occasional Japanese Translator Amateur Landscaper, Artist.


  3. QUANTITATIVE APTITUDE.


  4. Don't Forget RATE REVIEVw RECOMMEND DOUBTS IN THE COMMENT SECTION


  5. Number Systems... 2%


  6. -1x-1 = +1 +1 x-1 = -1 -1 x +1 = -1 +1 x +1 = +1


  7. Real Numbers Rational Number Irrational Numbers Square roots, cube roots, perfect squares, cubes, etc -If decimals do not terminate 3 is a rational number as 3 is 3/1 fourth roots, etc which are not Similarly, -5/9 etc, all these numbers are rational numbers - Recurring decimals (1.3333, they are irrational numbers decimals (1.25, etc) because these numbers are fractions


  8. Integers are all rational numbers. There are 3 types: 1. Positive integers (1,2,3,4, ,oo) 2. Negative integers (-1, -2, -3, -4, , -00) 3. Zero (0) Positive integers are further classified as Prime numbers and Composite numbers One (1) is neither Prime nor Composite.


  9. Positive Integers PRIMENUMBERS COMPOSITENUMBERS -RELATIVE PRIMES A number which doesn't have any other factors beside 1 A number greater than 1 which is not a prime number Also called co-primes -Two numbers that don't have any common factor other than 1 4, 6, 8, 9, 10, etc -2, 3, 5, 7, 11, 13, 17, etc Any prime number greater than 3 can be written or expressed as (6k-1) or (6k 1);k being the interger 23, etc 15 primes between 1 to 50 15, 16, 1 is a relative prime to al numbers 10 primes between 50 to 100


  10. Some more.. MULTIPLES FACTORS If two numbers a and b, such that if we divide either one with the other number, it would be perfectly divisible . 15 = 3*5 so 3 and 5 are factors of the number - So factor/s divide the number perfectly. 2 so 12 is - eg.: 6, 12 (12/6 a multiple of 6)