This math puzzle looks easy, but the correct answer depends on following the order of operations.
The expression is:
15 + 5 × 0 + 4
Multiplication comes first:
5 × 0 = 0
Now complete the remaining addition:
15 + 0 + 4 = 19
The ×0 only affects the 5 it is multiplying. It does not make the entire expression equal zero.
Answer: 19.


