Can you solve this equation in less than 15 seconds? The equation is 9-2=3. But there’s a catch – it’s wrong! This is a classic example of an IQ test, puzzle or brain teaser. It is designed to test our logic and problem solving skills, and measure our intelligence quotient (IQ). Brain teasers are popular … Continue reading Brain teaser: Test your IQ with this tricky matchstick challenge! Only 2 moves allowed in 15 seconds!