Check whether 30n end with zero
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30= 3•2•5
The prime factorisation of 30 contains 2 and 3. Therefore 30n can end with the digit 0.
The prime factorisation of 30 contains 2 and 3. Therefore 30n can end with the digit 0.
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2
if 30n can end with the digit zero so it is divisible by five for any natural no. n so 30n cannot ent with the digit zero so it is not divisible by 5 for any natural no. n
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