Suppose a clock takes 7 seconds to strike 7. How long does it take for the same clock to strike 10?
Riddle AnswerHard Riddles
Sum of Hats Puzzle
There are 3 people Abel, Bill and Clark. Three of them have numbers (positive integers) written on their hats. They can see the numbers on the other two hats but not their own. The number on one hat is the sum of the numbers on the other two hats. They are given this information and asked in turn if they can identify their number.
In the first round Abel, Bill and Clark each in turn say they don’t know. In the second round Abel is first to go and states his number is 50. What numbers are on Bill and Clark?
Riddle AnswerOld Auto
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 AnswerStrange Product
If one costs $2, twelve costs $4 and one hundred twenty-three costs $6, what are you buying?
Riddle AnswerCylinder Surrounded by a Thousand Squares
A 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