Arithmetic Aptitude Questions Answers

Q 6. Simplify 586645 * 9999

A. 5865863355
B. 5665863355
C. 4865863355
D. 4665863355

Answer: Option A

Explanation:

Although it is a simple question, but the trick is to save time in solving this.
Rather than multiplying it we can do as follows:
586645 * (10000 - 1) = 5866450000 - 586645 = 5865863355


Q.7. What least value should be replaced by * in 223*431 so the number become divisible by 9
A. 3
B. 4
C. 5
D. 6

Answer: Option A

Explanation:

Trick: Number is divisible by 9, if sum of all digits is divisible by 9, so (2+2+3+*+4+3+1) = 15+* should be divisible by 9,
15+3 will be divisible by 9,
so that least number is 3.