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Q.

Find the one's digit of the cube of 53.

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a

7

b

1

c

3

d

5

answer is B.

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Detailed Solution

First, consider the number 53.
Here the last digit of 53 is 3.
The cube of 3 is 27.
⇒3³=27
Here the last digit of 3³is 7.
Hence the one’s digit of the cube of 53 is 7.

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Find the one's digit of the cube of 53.