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# Modular Arithmetic

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Given that $33^{-1} \equiv 77$ (mod $508$), find $17^{-1}$ (mod $508$) as a residue modulo 508. (Give an answer between 0 and 507, inclusive.)

Jan 7, 2022

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Please resubmit your question and input your LaTex  properly, via the LaTex box (which can be found in the ribbon.)

Note: everything between \$ signs is LaTex.

If you are too lazy to do this then why should anyone be bothered to answer you.

I have closed this question.

Jan 8, 2022
edited by Melody  Jan 8, 2022