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16-06-2021
Mathematics

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show that 12''cannot end with the digit 0 or 5 for any natural number n.

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16-06-2021

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dxb4635824 dxb4635824

17-06-2021

Answer:

If any number ends with the digit 0 or 5, it is always divisible by 5. If 12n ends with the digit zero it must be divisible by 5. This is possible only if prime factorisation of 12n contains the prime number 5.

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