Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
12 lessons,
2h 18m
Chapter 1: Types of Numbers
2,084 plays

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.

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.



  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)