Arithmetic Reasoning is less about difficult computation than translating a short story into the right operation. Train yourself to name the unknown, ignore extra details, estimate the answer range, and then calculate without a calculator.
01
Translate words into operations
Turn phrases such as “per,” “of,” “difference,” and “total” into equations before touching the numbers.
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- “Of” often signals multiplication, while “per” signals a rate or division.
- Define the unknown with a variable and attach units to every quantity.
- Check whether the question asks for a total, a remaining amount, a rate, or a percent.
02
Ratios, proportions, and percents
Use equivalent ratios for scale problems and convert percent language into a part-whole relationship.
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- Percent means “out of 100”: part = percent × whole.
- For a proportion, cross-multiply only after matching corresponding units.
- Percent change uses the original amount as the denominator.
03
Distance, rate, and time
Recognize motion questions and decide whether rates combine, differ, or stay constant.
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- Distance = rate × time, so rate = distance ÷ time and time = distance ÷ rate.
- Vehicles moving toward each other have a combined closing rate.
- Convert minutes to hours before multiplying by miles per hour.
04
Work, money, and averages
Apply unit rates to jobs, purchases, wages, discounts, tax, and mean values.
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- A work rate is the fraction of one job completed per unit of time.
- Apply successive discounts or tax one step at a time, not by simply adding percentages.
- Average = total of the values ÷ number of values.
05
Measurement and geometry
Use basic area, perimeter, and volume formulas in real-world settings while keeping units consistent.
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- Perimeter measures boundary length; area measures surface; volume measures capacity.
- Convert all dimensions to the same unit before using a formula.
- Estimate the result to catch a misplaced decimal or wrong conversion.