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## Answers

The answer is 6. as if we add 6+5+2we get 13 and if we add 3+6+4 we get 13

so LHS=RHS

so LHS=RHS

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A number is divisible by 11, if the difference of sum of digits in the odd places and the sum of digits in even places is either 0 or divisible by 11.

sum of digits in odd places = k+5+2 = k+7

sum of digits in even places = 3+6+4 = 13

So k+7 = 13

or

sum of digits in odd places = k+5+2 = k+7

sum of digits in even places = 3+6+4 = 13

So k+7 = 13

or

**k = 13-7 = 6**