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Question

Find the remainder when 727163 is divided by 10.


A

7

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B

9

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C

1

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D

3

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Solution

The correct option is D

7


We need to find out the unit digit of the given number.

271634=27even number4=(1)even number4=1

Now the question changes to finding the unit digit of 74n+1. From the power cycle of 7, unit digit will be 7. Hence, the remainder is 7.


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