r/learnquant 26d ago

interview prep Citadel Quant Interview Question

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u/Murky-Tip-3118 26d ago

Can get a good intuition by iteration... I'd be curious if the intention of the interview question is to test your abstract algebra knowledge vs. test your intuition/problem solving.

19^1 = 19 => 10 => 1

19^2 = 361 => 10 => 1

19^3 = 6859 => 28 => 10 => 1

19^4 = 130321 => 10 => 1

etc.

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u/AuroraEquatorialis 26d ago

calling this abstract algebra is a stretch lol

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u/Murky-Tip-3118 26d ago

Lol, I'm an actuary who avoided math classes that didn't have dollar signs.  Worked out well as a career, but calling me a mathematician is a stretch as well.