The Real Reason Why Man-hole Covers are Round

I was about to rant at length about the stupidity of using puzzle questions for software developer interviews when Google took care of it for me: http://qz.com/96206/google-admits-those-infamous-brainteasers-were-completely-useless-for-hiring/ Google did the math and came up with two conclusions: The infamous puzzle questions had zero correlation as a predictor of success, and the questions themselves merely served […]