Make it True

81 x 9 = 801. What must you do to make the this equation true?




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When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
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When I divide it by 10, the remainder is 9.

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When I looked for a smaller number with this property I couldn't find one.

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Challenging

There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.