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Spare parts has comics and random math topics for discussion. Includes questions (and answers), puzzles, and links to other sources.
Two cars are opposite each other on a 1-mile oval track.
The red car is racing at 85 miles per hour. And, the blue car is speeding at 90 miles per hour.
How many minutes will it take the blue car to catch the red car?
"Three men breaking bread"
A hungry traveler meets 2 men with some bread.
The first man has 5 loaves, and the second man has 3 loaves.
The two men generously put their loaves of bread into the center, and then they split the bread equally (3 ways).
After the meal, the satisfied traveler reaches into his pocket and pulls out 8 coins to compensate the men... He hands the first man 5 coins and the second man 3 coins, and then he leaves...
Later, the traveler realizes that he had split the coins incorrectly and paid each man the wrong amount!
Why? How should the traveler have divided the 8 coins among the two men?
Identify the coordinates of each vertex in the following regular polygons
(Measured in cubic feet,) how much dirt is in a rectangular shaped hole that is 4 feet by 6 feet and 18 inches deep?
Finding an area math puzzle
Can you figure out the answer to the riddle?
"When I phone aunt & uncle, I reach Las Vegas. Or, when I dial wife + son, I get New York."
"If I dial niece & baby, what area do I get?"
Distance and Time
Currently, it is 3:30pm.
Within the next hour, at what time -- to the nearest second -- will the minute hand lie on top of the hour hand?
Find more clock questions in the Geometry Introduction.