Math interview questions

148 math questions from quant interviews, each with the approach, the worked solution, and the concepts it tests.

The set breaks down as 69 easy, 33 medium, 31 hard and 15 expert.

Firms that ask math questions in this bank include Goldman Sachs, Citadel, Two Sigma, Hudson River Trading and Morgan Stanley.

A question from this topic: If you have a 10x10x10 cube painted on the outside, how many 1x1x1 cubes have no paint?