Number System
Number System Natural Numbers - Counting numbers are called natural numbers. • The least natural number is 1. • There are infinitely many natural numbers. Whole Numbers - All natural numbers together with 0 form the collection of all whole numbers. • The least whole number is 0. • There are infinitely many whole numbers. • Every natural number is a whole number. • All whole numbers are not natural numbers, as 0 is a whole number which is not a natural number. Integers - All natural numbers, 0 and negatives of natural numbers form the collection of all integers. • 0 is neither negative nor positive. • There are infinitely many integers. • Every natural number is an integer. • Every whole number is an integer. SSC previous year questions (Important) Q. 1. Which of the following fraction is the greatest? 2/3 , 5/6 , 11/15 , and 7/8 A). 7/8 B). 11/15 C). 5/6 D). 2/3 Q. 2. If a number is as much greater than 31 as it is less than 75, then