Which expression has an answer of 18?
Correct answer: B. 2 x (4+5)
- A. 2 x 5 + 4
- B. 2 x (4+5)
- C. 5 x (2+4)
- D. 4 x (2+5)
Explanation
The correct option is B: 2 x (4+5). According to the BODMAS rule, solve the expression inside the brackets first, which is 4 + 5, giving 9. Then multiply by 2 to get 18. Other options fail to give 18 because they either multiply or add in a wrong sequence, resulting in different values: Option A gives 14, Option C gives 30, and Option D gives 28.
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About Quantitative Reasoning
Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.
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