Think you’re good at solving number puzzles? This one may look incredibly simple, but it can still make you stop and think for a moment. Take the equation 432 + 1?8 = 600. Your task is to figure out which single digit should replace the question mark. There’s no complicated formula involved—just some basic subtraction and careful attention.

The simplest way to solve the puzzle is to work backward from the total. Since 432 is being added to the unknown number to make 600, subtract 432 from 600. That gives you 168. Now compare 168 with the mystery number written as 1?8. The first digit is already 1, and the last digit is already 8, so only the middle digit is missing.

That means the missing digit must be 6. Once you place it in the equation, the puzzle becomes 432 + 168 = 600, and the calculation works perfectly. What initially looks like a tricky brain teaser turns out to require nothing more than a straightforward subtraction problem.

Did you spot the answer immediately, or did you have to work through the equation step by step? If you got it right, challenge a friend or family member and see how quickly they can solve it. Sometimes the easiest-looking puzzles are the ones that make us think twice!