Challenge: Before Time Runs Out, Solve This Riddle!
Can you use math to escape the temple? Dennis E. Shasha will show you how.
Are You Clever Enough to Crack the Passcode Riddle?
This riddle has been driving the internet crazy since summer. Are you one of the few who can crack this puzzle?
Test Your Problem Solving Skills with This Baffling Riddle
This famous riddle will really test your problem solving skills.