can the number 6n,n being a natural number,end with digit 5?give reasons.

Asked by FEHMEEDAH NAZNEEN | 30th Aug, 2010, 09:28: PM

Expert Answer:

Consider the number 6n , for n a natural number.
A number ending with digit 5, must be divisible by 5.
But 6 x 5 =30.
So 6 multiplied by any multiple of 5 has last digit zero.
so the last digit of 6n can never be 5.

Answered by  | 31st Aug, 2010, 10:05: AM

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