This quick math puzzle asks you to solve 10 + 10 − 10 × 0 + 10 without using a calculator.
The correct answer is 30.
The key is the order of operations. Multiplication must be completed before addition or subtraction, so first calculate:
10 × 0 = 0.
The expression then becomes:
10 + 10 − 0 + 10.
Now work from left to right: 10 + 10 = 20, subtracting zero keeps it at 20, and adding the final 10 gives 30.
This puzzle catches people who rush through the expression from left to right without doing multiplication first. If you got 30, you followed the standard order of operations correctly.
