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Question

If A381 is divisible by 11, find the value of the smallest natural number A?

A
5
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B
6
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C
7
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D
9
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Solution

The correct option is C 7
A 381 is divisible by 11 if and only if (A+8) -(3+1)
is divisible by 11.
So, A = 7 Satisfies the condition.

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