Are you up for a challenge? We are testing your problem-solving skills with a tricky brain teaser. The starting equation is 9-1=6, but this equation is wrong. Can you solve this error in less than 30 seconds? IQ tests, puzzles, and brain teasers have been around for centuries, and they remain popular today. Puzzles help … Continue reading Math challenge: Can you solve this puzzle in under 30 seconds with just 1 move? Test your IQ!