What is the value of $187^2 \mod 100$?
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What have you tried? This has been asked many times. – Dietrich Burde Mar 01 '21 at 20:18
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1Welcome to stackexchange. If you [edit] the question to show us what you tried and where you are stuck we may be able to help you. Until you do that you will probably get just votes to close and downvotes. – Ethan Bolker Mar 01 '21 at 20:18
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1@EthanBolker: unfortunately, the question was answered, so the OP will continue to post such questions. – robjohn Mar 01 '21 at 20:21
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$187\equiv-13\pmod{100}$, $(-13)^2\equiv69\pmod{100}$
Jeff
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5I am glad you want to help here. That said, I would rather people did not answer simple questions like this where the OP shows no effort of their own. – Ethan Bolker Mar 01 '21 at 20:19
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