How to measure 9 minutes using only a 4 minute and 7 minute hourglass
Quantitative Developer Interview Questions
612 quantitative developer interview questions shared by candidates
How many numbers between 1 and 1000 contain a 3?
You have a chest of 8 drawers. With probability 1/2, you put a letter in one of the drawers. With probability 1/2, you don't put a letter in any drawer. I open the first 7 drawers, all are empty. What is the probability there is a letter in the 8th drawer?
If you toss a coin n times, what's the expected value of n if you get the 2nd head?
You are given an array, and a number x. Determines whether or not there exist two elements in in the input array whose sum is exactly x, efficiently.
Given a m*n matrix with values -1 or 1, try to flip the values in a given row and a given line efficiently.
What is the probability of an integer from 1 to 60,000 not having the digit 6?
Given a char buffer[4096], write a malloc implementation.
keep throw a coin if two head A will win if first is head second is tail B will win, keep throwing until have a winner. who has better chance to win?
Rotate a matrix counter-clockwise
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