Challenge your mind with this optical illusion puzzle that tests your observation and problem-solving skills. The image ...

The problem, which was first posed more than a thousand years ago, concerns the areas of right-angled triangles ... t take long to write the specialized program needed for this particular ...

According to Business Insider reporter Andy Kiersz, the answer lies in figuring out the height of the pink triangle. “The key trick is that the little triangle up top is similar to the pink ...

Save guides, add subjects and pick up where you left off with your BBC account. Problem 5 is all about triangles and figuring out how they fit together. Maths teacher Chris Smith and pupils from ...