Cube of a number ending in 7

Question:

Cube of a number ending in 7 will end in the digit________

Solution:

3

We know that, the cubes of the numbers ending in digits 3 or 7 ends in digits 7 or 3, respectively.

i.e 7 x 7 x 7 = 343

Hence, the cube of a number ending in 7 will end in the digit 3.

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