This brain-teasing math problem created by Puzzles9 presents three pentagons, each with a set of five numbers. But there's a catch — the middle pentagon is missing a number in the bottom right ...

The Ramsey number – the smallest number of points we need to make this happen – is six. When mathematicians look at a problem, they often ask themselves: Does this suggest another question?

Challenge your brain with this tricky math puzzle! Test your IQ, boost your problem-solving skills, and see if you can solve ...

You and a friend have arranged to meet at a popular downtown mall between 3 p.m. and 4 p.m. one afternoon. However, you neglected to specify a time within that one-hour window. Therefore, each of you ...

Think you have a 160+ IQ? Try solving this challenging math riddle in just 17 seconds. Boost your logic, sharpen your mind, ...

As a child of the 1990s, I couldn’t avoid the game-turned-best-seller Tetris. Launched in 1984 by Russian programmer Alexey ...

Find one million consecutive positive numbers, none of which are prime.

By extending the scope of a key insight behind Fermat’s Last Theorem, four mathematicians have made great strides toward ...

Enter Sweet 16, a new math puzzle game. As the name suggests it involves the numbers 1 through 16, and it's a bit like sudoku in the sense that the player must put the numbers into a square array ...

It turns out that an amazingly simple test can answer this for any graph: For every vertex (landmass in our current puzzle), count the number of edges (bridges) emanating from it.

The puzzle looks something like Scrabble, with a series of boxes that snake up, down and across a page. Some boxes have a number, others have a math symbol and some are blank.