Question

Find the least value of M , so that 2M5 is divisible by 3

• A. 2
• B. 0
• C. 1
• D. 3

Answer 1

The correct option is A

2

A number is divisible by 3 , if the sum of the digits is divisible by 3

2M5 = 2 + M + 5 = 7 + M ;

So the least number it can add upto is 9 , since it is divisible by 3

Hence M + 7 = 9

$\therefore$ M = 2