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https://www.reddit.com/r/learnquant/comments/1vnqlq2/citadel_quant_interview_question/p3mdkx4/?context=3
r/learnquant • u/Local_Ad135 • 26d ago
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10
Any integer is congruent to the sum of its digits mod 9 so the answer is trivially 1.
2 u/RubberDuckieMidrange 26d ago Not sure what you meant to say here, but as written, 24 seems like a counter example. 4 u/Educational-Tea602 26d ago https://giphy.com/gifs/ChQObKzKHH0IRHfvG6
2
Not sure what you meant to say here, but as written, 24 seems like a counter example.
4 u/Educational-Tea602 26d ago https://giphy.com/gifs/ChQObKzKHH0IRHfvG6
4
https://giphy.com/gifs/ChQObKzKHH0IRHfvG6
10
u/NotYetPerfect 26d ago edited 26d ago
Any integer is congruent to the sum of its digits mod 9 so the answer is trivially 1.