Question

QUES. Check whether 5n can end with the digit 0 for any natural number n.​

Answer 1

Step-by-step explanation:

It should be divisible by 10 or in other words, it will also be divisible by 2 and 5 as 10 = 2 × 5 It can be observed that 2 is not in the prime factorisation of 5n. Hence, for any value of n, 5n will not be divisible by 2. Therefore, 5n cannot end with the digit 0 for any natural number

Answer 2

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It should be divisible by 10 or in other words, it will also be divisible by 2 and 5 as 10 = 2 × 5 It can be observed that 2 is not in the prime factorisation of 5n. Hence, for any value of n, 5n will not be divisible by 2. Therefore, 5n cannot end with the digit 0 for any natural number

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