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Show that 4n can never end with the digit zero for any natural number n.      
Asked by ratendra.johri | 27 Apr, 2018, 07:06: PM
answered-by-expert Expert Answer
We heve 4n  where n = 1, 2, 3, 4.......

if n = 1 then 4n = 41 = 4
if n = 2 then 4n = 42 = 16 and so on

If a number ends with zero then it is divisible by 5.

Here, 4 and 16 are not dividible by 5.

Therefore, 4n can never end with zero.

Answered by Yasmeen Khan | 28 Apr, 2018, 11:19: AM

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