Correct Answer:
B. 47
Correct answer: 47. Powers first: 8 × 9 − 25 = 72 − 25 = 47.
Background: Follow BODMAS: brackets, orders (powers), division and multiplication, then addition and subtraction.
- 42: 42 is not 72 − 25.
- 49: 49 is not 72 − 25.
- 51: 51 is not 72 − 25.
Did you know? Multiply before you subtract.
Memory trick: BODMAS.