John was asked how old he is. He said, “In 2 years I will be twice as old as I was 5 years ago.”
How old is John?
Riddle AnswerMath Riddles
2 Child Probability
Mr. Jones has two children. The older child is a girl. What is the probability that both children are girls?
Riddle AnswerRich Merchant’s Gold Coins
A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, “How many gold coins do we have?”
After pausing a moment, he replied, “Well! If I divide the coins into two unequal numbers, then 32 times the difference between the two numbers equals the difference between the squares of the two numbers.”
The wife looked puzzled. Can you help the merchant’s wife by finding out how many gold coins they have?
Riddle AnswerKing-size Conundrum
A medieval king needed to work out how he could recruit fighting men for the battle ahead. However, there were so many distractions around the castle, his thinking became confused. So in order to change his daze into knights, he asked for a secluded walk to be made so he could ponder in peace.
The head gardener was given the job of planting lines of high bushes. First, he planted a line running 100 paces east. Then from the end of that line he planted a line 100 paces north, then 100 west, 98 south, 98 east, 96 north, 96 west, and so on. This made a square spiral path 2 paces wide.
If the king intended to walk down the middle of the path, how long was the path?
Riddle Answer3 Ants on Vertices of Triangle
Suppose that you have a triangle with 3 ants on different vertices (corners) of the triangle. What is the probability that either 2 of the ants or all of the ants collide if all 3 ants start walking on the sides of the triangle?
Riddle Answer