A bathtub has two taps and a plug hole. The cold tap on its own fills the bathtub in 18 minutes. The hot one on its own fills the bathtub in 15 minutes. The plug hole can drain the bathtub in 10 minutes with the taps off.
How long will the bathtub take to fill if both taps are turned on and the plug left out?
Riddle AnswerA farmer challenges an engineer, a physicist, and a mathematician to fence off the largest amount of area using the least amount of fence.
The engineer made his fence in a circle and said it was the most efficient.
The physicist made a long line and said that the length was infinite. Then he said that fencing half of the Earth was the best.
The mathematician laughed at the others and with his design, beat the others. What did he do?
Riddle AnswerWhat’s the least number of chairs you would need around a table to sit four fathers, two grandfathers, and four sons?
Riddle AnswerA girl has exactly enough money to buy three sweaters and two skirts, or three skirts and no sweaters. All sweaters are the same price, and all skirts are the same price.
What is the maximum number of sweaters she can buy if she buys only one skirt?
Riddle Answer