Question

Replace (*) by the smallest digit so that:
(a) 439 *7 is divisible by 9

Answer 1

HEYA!
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✳DIVISIBILITY BY 9 ✳
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✨The divisibility rule is that a number is divisible by 9 provided it is divisible by 3 also .

The given number ,

439 ¥ 7

Divisibility by three : Sum of numbers should be divisible by 3

Here , the sum is : 4+3+9+7 = 23

Hence the smallest digit is 1 { as then the sum = 24 that is divisible by 3 }


Hence the number is 43917

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