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If (12n + 1) is divisible by 13 then n is...

This question belongs to Arithmetic Ability Number System
Number System
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If (12n + 1) is divisible by 13, then n is :

Answer & Solution
Correct Answer: Option C
(xn + an) is divisible by (x + a) when n is odd.
∴ (12n + 1) is divisible by (12 + 1) i.e., 13 when n is odd.
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