The image shows a matchstick equation that is not correct. Can you fix it by moving just one matchstick? You only have 17 seconds to solve this tricky puzzle. Give your brain a quick challenge.

Brain teasers are short puzzles designed in such a way that they encourage logical thinking. These puzzles surely appear very simple at first but they have many twists. There are many types of brain ...

If the shape remains constant, find the total time T until the cone reaches 9 feet high.

Take the pressure off of problem solving with engaging thinking games that encourage students to work together to find solutions. Like many teachers, I used to think of problem-solving as something I ...

David Genter began designing math puzzles about 20 years ago, when he worked on diesel engines as an engineer. Genter's puzzles will be printed where space permits in the Daily Press every Tuesday ...

Can you solve this tricky math puzzle 🧮?!! Trump takes calls from kids on Christmas Eve: 'You don't want clean, beautiful coal, right?' The US may have a secret weapon against rising electricity ...

Add Yahoo as a preferred source to see more of our stories on Google. The nine rectangles A, B, C, D, E, F, G, H and I overlap one another. Rectangle A intersects ...

Once upon a time, four queens known as the queens of blue, red, green and pink were locked in a bitter feud. The monarchs lived on four islands, all the same size, yet each with its own distinctive ...

One string in each of the following pairs can be unraveled into a circle—the so-­called unknot. Which one is it? Show puzzle solution The knots at the top left and the bottom right can be unraveled ...

Draw four lines beginning and ending at the gray points to break this square into pieces that can be rearranged into five identical squares. Bonus: Suppose you can use any number of lines that begin ...

The circle above contains four intersecting chords. Lengths are: a = 2y + 3, b = 7x − 5, c = 5x − 1, d = y + 9, e = 7x − 3, f = 9x − 5. Find the area A of the entire circle. Send the correct answer to ...

The number in each polygon with n sides is the sum of the first n prime numbers’ values. The following applies to the decagon: We’d love to hear from you! E-mail us at games@sciam.com to share your ...