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Question

If (232+1) is divisible by a certain number then which of the following is also divisible by that number

A
(2161)
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B
216+1
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C
296+1
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D
None of these
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Solution

The correct option is D 296+1
Let 232=x
Then,(232+1)=(x+1)
Let (x+1) be completely divisible by the natural number N. Then,
(296+1)=[(232)3+1]=(x3+1)=(x+1)(x2x+1), which is completely divisible by N, since (x + 1) is divisible by N.

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