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Is 2011 64 + 64 a prime or composite ?Please justify.

Is 201164 + 64 a prime or composite ?Please justify.

Grade:11

1 Answers

aditya ##
14 Points
10 years ago

obviously it is! becos 201164  ends with units digit 1 & this on addition with 64 gives units digit 5 hence it is divisible by 5

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