At first glance, this looks like a quick and easy calculation—something you could solve in seconds without even thinking twice. But that’s exactly where most people make a mistake.

The expression 35 − 5 × 3 is designed to trick your brain into rushing. Many people instinctively go from left to right and subtract first, getting the wrong answer almost immediately. It feels natural… but it’s not correct.

This is where the order of operations comes in—a basic math rule that many forget under pressure. Multiplication always comes before subtraction. That means you first calculate 5 × 3 = 15, and only then subtract it from 35.

So the correct calculation becomes 35 − 15 = 20.

What makes puzzles like this so engaging is how they expose how quickly we rely on instinct instead of rules. A simple shift in thinking completely changes the outcome.

And that’s why these questions go viral—because even the easiest problems can trip people up when they’re not paying full attention.

So… did you get it right the first time?