1. The rightmost non-zero digit of the number $$30^{2720}$$ is
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By: anil on 05 May 2019 02.29 am
Rightmost non-zero digit of $$30^{2720}$$ is same as rightmost non-zero digit of $$3^{272}$$. 272 is of the form 4k. All $$3^{4k}$$ end in 1. => Right most non-zero digit is 1.
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