Puzzles and brain teasers have long been used as a way to measure intelligence and problem-solving skills. Today’s challenge is to solve this equation in less than 25 seconds: 1+4=5-9. It may seem simple, but there’s an error – can you spot it? Brain teasers have become increasingly popular on social networks, with friends challenging … Continue reading Brain teaser: Test your IQ – Just move 1 matchstick to solve it in 25 seconds or less!