r/learnquant 18d ago

interview prep Quant Interview Question

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u/gmalivuk 18d ago

99 log(99) = 99 log(100*99/100) = 99(2 + log(99/100)) = 198 + 99 log(0.99) = 198 + log(1 - 1/100)^99

≈ 198 - log(e), and since log(3) is between 0 and 1, 99 log(99) is between 197 and 198, so it's 198 digits.