Question

if 213x 27 is divisible by 9 , then what is the value of x? plz ans briefly

Answer 1

Ans.

Since the number is divisible by 9, then the sum of the digits are also divisible by 9.

So,
2 + 1 + 3 + x + 2 + 7 = 9k
or, 15 + x = 9k
When x=3, LHS=18, divisible by 9.

Hence, the answer is x=3.
The number is 213337.

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