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Quantitative Aptitude

Unit Digit of a Number

What is the r...

Question

What is the rightmost digit preceding the zeroes in the value of $20^{53}$ ?

A

2

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B

8

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C

1

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D

4

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Solution

The correct option is A 2
We have to find the unit's digit of $2^{53} \to 2^{4 n + 1} \to 2$ as the units digit.

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