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Quantitative Aptitude

Functions

Q. The unit's...

Question

Q. The unit’s digit in the following operation $5127^{127}$

A

6

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B

4

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C

3

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D

8

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E

7

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Solution

The correct option is C 3
$7^{4}$ gives 1
$7^{127} = 7^{31^{4}} \times 7^{3} 7^{3}$ gives 3 in units place

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