Exams › SSC CGL (Prelims) › General

In the number 72864*$, what digits should replace * and $ respectively so that the number is divisible by both 8 and 5?

1. 4 and 5
2. 2 and 0
3. 4 and 0
4. 2 and 5

Correct answer: 4 and 0

Solution

Divisibility by 5 requires the last digit ($) to be 0 or 5. Divisibility by 8 requires the last three digits (4*$) to be divisible by 8. With $ = 0, the last three digits become 4*0. Testing * = 4: 440 / 8 = 55 exactly. So * = 4 and $ = 0.

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