Simplification and Approximation forms an important part of all Banking exams as 3-5 questions are expected from this chapter alone. In Simplification, we have to simplify & calculate the given expressions whereas, in Approximation, we take the approximate values & give the answers accordingly. Basic Rules of Simplification BODMAS Rule It defines the correct sequence

## Number System

1. The sum of all prime numbers between 58 and 68 is (a) 179 (b) 178(c) 187 (d) 183 S.S.C. Online CHSL (T-I) 16 Jan., 2017 (II-Shift) S.S.C. Online CHSL (T-I) 7, 20, 22 Jan., 2017 (I-Shift) Ans.(c) Solution: Prime number between 58 and 68 are 59, 61, 67. Sum of prime number 59 +61