Practice Problems

Chess Players Problem

20 chess players hold a tournament in which each player plays just one game with each of the other players. How many games are played altogether?

The Old-Fashioned Toaster Problem

An old-fashioned toaster will toast two slices of bread at once, but it only toasts one side of each slice of bread at a time. Ana likes each side of her bread to be toasted for exactly one minute. How can she toast three slices of bread in three minutes?

Raccoons

Four raccoons went down the lake for a drink. Two got their front feet wet. One got its back feet wet. How many dry feet were there?

Cows and horses

There were 4 cows and 3 horses in a field. How many tails and legs were there altogether?