This math tutorial features an exercise in which you are given any two-digit number that ends in 5 and then square it in your head.

At this site create your own puzzles, build your own maze and print them out for yourself or others to enjoy.

This site presents a problem at a museum that has one large square gallery. The director wants to divide this room down the middle into four smaller square rooms.

A fun puzzler to get any mind thinking logically! Try many levels of puzzles using the following rules: "Enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3...