Here is the remarkable story of Aristotle's wheel. Consider a circular wheel with a circular hubcap having the same centre as the wheel.
The 1985 International Mathematical Olympiad held in Finland was a most successful one for Australian Participants.
We live and function in a three-dimensional space all through our existence, weare surrounded almost exclusively by three dimensional objects,
Everybody learns some set theory early in high school.
Q.624 Three motorists $A,B$, and $C$ often travel on a certain highway, and each motorist always travels at a constant speed.