An old auto is to drive a stretch of 2 miles, up and down a hill. Because the auto is so old, you cannot drive the first mile (the ascent) faster than 15 miles per hour.
How fast do you have to drive the second mile (going down the hill) in order to get an average speed of 30 miles per hour?
Riddle AnswerSuppose a clock takes 7 seconds to strike 7. How long does it take for the same clock to strike 10?
Riddle AnswerTwo boys wanted to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both of the boys managed to cross the river using the boat. How was it possible?
Riddle AnswerIf one costs $2, twelve costs $4 and one hundred twenty-three costs $6, what are you buying?
Riddle AnswerA rich old lady died and left all her money to her grandchildren and her children. At the end of the will she stated that she had one last thing to give away: her precious diamond.
She gave a clue to where it might be. She said “it’s in a cylinder surrounded by a thousand squares.” One grandchild said, “I know where it is,” and found it. Where was it?
Riddle Answer