If 7 × 8 is exactly divisible by 3, then the least value of x is A. – InterviewSolution

1.

If 7 × 8 is exactly divisible by 3, then the least value of x is A. 3 B. 0 C. 6 D. 9

Answer»

We know that if sum of digits of a number is divisible by 3, then the number is divisible by 3.

Here,

7 + x + 8 = multiple of 3

x + 15 = 0, 3, 6, 9, ….

Hence,

x + 15 = 15

x = 0

∴ the least value of x is 0

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