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If x48y is exactly divisible by 9, then the least value of (x + y) is A. 4 B. 0 C. 6 D. 7 |
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Answer» We know that if sum of digits of a number is divisible by 9, then the number is divisible by 9. Here, x + 4 + 8 + y = multiple of 9 x + y + 12 = 0, 9, 18, …. Hence, x + 11 = 18 ∴ x = 7 ∴ the least value of x is 7 |
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