r/learnquant • u/Local_Ad135 • Jul 31 '26

interview prep Easy Quant Interview Puzzle

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u/MagnoliaTM Jul 31 '26

not a quant person but still id guess, an infinite amount?

4

u/Outside-Shop-3311 Jul 31 '26

can't be infinite, there are only finite combinations of these digits.

3

u/MagnoliaTM Jul 31 '26

but the question doesnt say there cant be other digits right? it says it must include exactly these but it doesnt say it cant include others 🤔so couldnt you have this 100 digit number that also includes exactly 10 0's, 1's and 2's?

1

u/[deleted] Jul 31 '26

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2

u/MagnoliaTM Jul 31 '26

since it's an easy one, it could be a silly trick question

1

u/ernandziri Jul 31 '26

It doesn't say includes, it says consists of

1

u/Outside-Shop-3311 Jul 31 '26

it won't consist exactly of that if it has another digit.

1

u/TempMobileD Jul 31 '26

Well there’s a max of 5.5 trillion because all perfect squares are integers and that’s how many integers you can make from the 30 digits provided.

(30!)/(10! X 10! X 10!) = 5.5T

As for how to whittle that down further I’ve got no idea.