Challenge your brain today with riddles, puzzles and problems.
There are eight teams in a junior hockey league and during hockey season, every team plays each of the other teams exactly once. How many games do the teams play during the season? Answer: The grid below shows 8 rows of 8 columns. The cell in row 3 column 2 represents a game between team …
Pipe A fills a tank in 12 minutes. Pipe B fills the tank in 8 minutes. Pipe C fills the tank in 6 minutes. How long will it take to fill the tank if all three pipes are turned on? Answer: Pipe A fills 1/12 of a tank in one minute. Pipe B fills 1/8 …
A man is looking at a portrait of someone. Then, pointing to the person in the portrait he says, “Brothers and sisters, I have none, but that man’s father is my father’s son. Who is the person in the portrait? Answer: Since the person pointing to the portrait has no siblings, the phrase, “My father’s …
A fish was caught off the mouth of the Alpine River and its dimensions were as follows: The head was 6 inches long. The tail was as long as the head, plus half the length of the body. The body was as long as the head and tail combined. How long was the fish? Answer: …
There are two ducks in front of two ducks. There are two ducks behind two ducks. There are two ducks between two ducks. How many ducks are there? Answer: There are four ducks as shown in the diagram below.
Two flies are placed in a quart jar. Each day the number of flies doubles. At the end of 30 days, the jar was full of flies. When was the jar half full? Answer: Each day the fraction of the jar filled by flies is double the fraction filled on the previous day. When the …
Answer: The three people were a grandfather, his son, and his grandson. The grandfather’s son is both a father and a son.
