Three pennies and three nickles are arranged in a row. The pennies are red and nickles are green in color. The goal is to move them so that the coins are again in a row, with all pennies to the right and nickels to the left.
Each move consists of moving a pair of adjacent coins, and sliding those two coins to a new position without rotating the coins. How can you achieve this (shown below) in three moves?
Melissa, Jessica, Sandy and Nicole were working on the computer. Suddenly, I heard a crash and then lots of shouts. I rushed in to find out what was going on, finding the computer monitor on the ground, surrounded with broken glass! Sandy and Jessica spoke almost at the same time:
Jessica said, “It wasn’t me!”
Sandy said, “It was Nicole!”
Melissa said, “No, it was Sandy!”
Nicole said, “Sandy’s a liar.”
Only one of them was telling the truth, so who broke the monitor?
Riddle AnswerIf three men can chop down three trees in three hours, how many men will it take to chop down six trees in six hours?
Riddle Answer