Math, asked by shubhamidea33, 1 year ago

Show that 21 to the power n can not end with digit 0,2,4,6 and 8 for any natural number n

Answers

Answered by nizah95

0

The last digit of 21 to the power n will always be 1

Answered by SauraviSingla

0

this is based on cyclicity
last digit=1
so 1^ 8=1
so unit digit is 1

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