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Question

If the unit digit of a number is 3. What is the unit digit of its cube?

A
9
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B
3
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C
7
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D
1
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Solution

The correct option is C 7
If the unit digit of a number is 3 then its cube will have 7 in its unit digit and vice versa.
Ex:
33=27
133=13×13×13=2197

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