Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. Two puzzles are presented each week: the Riddler Express for those ...

Add Yahoo as a preferred source to see more of our stories on Google. There's a way to increase your odds of winning rock, paper, scissors — if only we had known these techniques in elementary school.

This week we are going to the Garden of Eden for a riddle penned by the British economist, writer, and bridge expert Hubert Phillips. Get ready for some rock-paper-scissors in paradise. Adam and Eve ...