# Brain Teaser: Guess the Diagonal

Try to solve this brain teaser in less than a minute.

Can you solve our toughest math and logic problems?

Try to solve this brain teaser in less than a minute.

Using math, can you get your friends and colleagues over the bridge before the zombies arrive?

The biggest unsolved problem in mathematics… The Riemann Hypothesis

This flower math problem was apparently given to 5 year olds in a Chinese kindergarten. Are you able to work it out?

This question appeared on a MIT Admissions exam almost 150 years ago!

This intelligence has challenged many on social media, can you solve it? "Share if you understood it."

This problem went viral on social media! Can you solve it? Find out in the video below!

The result is really strange!