This quick math puzzle asks you to solve 10 + 5 × 0 + 10 without using a calculator. The important part is remembering the standard order of operations.
The correct answer is 20.
Multiplication comes before addition, so calculate 5 × 0 first. That equals 0. The expression then becomes 10 + 0 + 10.
Add the remaining numbers and you get 20.
So the full calculation is: 10 + (5 × 0) + 10 = 20.
The puzzle looks simple, but many people instinctively work from left to right and miss the multiplication step. That is exactly what makes these short equations so effective.
