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Quantitative Aptitude

Remainder Theorem

Find the rema...

Question

Find the remainder when $629^{24}$ is divided by 21.

A

1

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B

2

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C

5

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D

11

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Solution

The correct option is A 1
When 629 is divided by 21, the remainder is -1. Thus the question changes to $\frac{(- 1)^{24}}{21}$ . Thus, remainder =1.

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