This quick math puzzle looks simple, but it is designed to catch anyone who ignores the order of operations:
20 + 10 × 0 + 5 = ?
Answer: 25.
Multiplication comes before addition, so start with 10 × 0. That equals 0. The equation then becomes 20 + 0 + 5.
Now add the remaining numbers: 20 + 5 = 25.
The common mistake is to work from left to right and add 20 + 10 first. But standard arithmetic rules require multiplication and division before addition and subtraction unless parentheses change the order.
So the correct final answer is 25.
