Question

Check whether 7^n can end with the digit 0 for any natural number

Answer 1

Answer:

Step-by-step explanation:

If 7n has to end with the digit 0 for any natural number n, then it has to be divisible by 10. By the fundamental theorem of arithmetics, we also know that there exist no other factors for 7. Thus we conclude that 7n cannot end with the digit 0 for any natural number n

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