This free, untimed review brings together percentages, ratios, proportional models, successive changes and weighted rates. Complete the four lessons first. Take as long as you need, and keep your working so that you can inspect the denominator, units and assumptions afterward.
There are 24 questions worth one mark each. A fully correct answer earns 1 mark; an incorrect or unanswered question earns 0. There is no pass/fail cutoff. Use your mistakes to decide what to revisit.
- Choose one: select exactly one option.
- Select all: select the complete correct set with no extra option. A partial set earns no credit.
- Enter a number: write the number in the requested unit. If a percentage number is requested, enter 15 for 15%, not 0.15. Follow any precision instruction in the question.
The questions mix methods deliberately. First identify the base or invariant, then calculate, and finally check whether the result makes sense.