examine whether 21 to the power n can end with the digit 0 for any natural number N
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No it cannot send with the digit 0
If a number raised to any power need to end with 0 then the number needs to have 2 and 5 as its prime factors
21=3*7
As 21 doesn't have 2and 5 as its prime factors it cannot end with the digit 0
If a number raised to any power need to end with 0 then the number needs to have 2 and 5 as its prime factors
21=3*7
As 21 doesn't have 2and 5 as its prime factors it cannot end with the digit 0
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