# Number System Aptitude Questions And Answers In Hindi Series Tricks

While Preparing for the bank and all other government Exams the first thing we do is to start from the topic Numbers, Number Series. So in this article we will provide Number System Questions and Answers in PDF format given below. Few things you must know before starting off with the given questions is there are 8 types of numbers which are:-

1. Natural Numbers- All the positive numbers are natural numbers like 1,2,3,4
2. Whole Numbers- All the numbers with zero is the whole number and zero is one and only whole number which is not natural number.
3. Integers- All the positive/negative numbers.
4. Even Numbers- Divisible 2 is even number
5. Odd Numbers- Not divisible by 2 is odd number
6. Prime Numbers- Numbers greater than 1 and can only be divisible by itself.
7. Composite Numbers- Numbers which are greater than 1 and which are divisible by itself and other numbers.
8. Co-primes- Number which gives HCF as 1.

1. (1 + 2 + 3 + 4 + 5……… + n) =n(n+1)/2
2. (l2 + 22 + 32 + 42 + 52… + n2) = n (n+1)(2n+1)/6
3. (13 + 23 + 33 + 43 + 53… + n3) =n2(n+1)2(*square)