What's the better way to cut your sandwich—into triangles or rectangles? What shape gives you MORE sandwich? Use math to definitively solve the sandwich debate.

Explore what makes a shape a triangle, a rectangle, or a square.

Brain teasers are a fun and fascinating way to challenge your mind and sharpen your problem-solving skills. Often requiring out-of-the-box thinking, they push your brain into a different gear. A ...

Yet another viral math equation is taking over the internet. This time, it's a pink triangle within a square that has people scratching their heads. Can you solve it?

We spent forever arguing about the brain teaser that asks: How many triangles do you see? Here, mathematicians reveal the real answer. See if you’re right.

The puzzle, which comes from a new book by London-based Alex Bellos, requires you to transform two triangles made from six matches into four triangles, by moving just two matches.