Question

Show that 3 power n multiplied by 4 power m cannot end with digit 0or 5 for amy natural numbers m and n

Answer 1

Answer:

3×4 = 12

Step-by-step explanation:

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Answer 2

Theorem:- Any number can be ended by digit 0 pr 5 at its unit place if the prime factors of the number only contains the digit 2 or 5 or both

in the above question the product of 3 and 4 is 12

it contains the prime factors 2×2×3

therefore the product also contains 3 as its factor.

therefore with the above theorem it is concluded that

3 power n multiplied by 4 power m cannot end with digit 0or 5.

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