Question

35n
why the number 15 where n is a natural
number and cannot end with the digit o?​

Answer 1

Answer:

If 15

n

is divisible by 10 then it can end with digit zero.

If it is divisible by 10, it has to be divisible by 5 and 2 both.

The prime factorization of 15 is 3×5.

15

n

=(3×5)

n

By observation, (3×5)

n

is divisible by 5 but not by 2.

Hence, 15

n

is not divisible by 10.

Hence, 15

n

does not end with digit 0 for any natural number n.

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