PROBLEM SOLVING

Best Value

Learn the reliable method for best value, then apply it to 11+ exam-style questions.

1 · WHAT YOU NEED TO KNOW

The idea

Best value is found by comparing equal quantities or unit prices.

Picture itPlan, solve, then check
2 · THE METHOD

Follow these steps

  1. Calculate the cost per item or per standard unit for each offer.
  2. Compare like with like.
  3. Account for whole packs when the required quantity cannot be split.
3 · WORKED EXAMPLES

See the method in action

Example 1

Which offer is better value: 6 pens for £4.50 or 10 pens for £7.20?

  1. The unit prices are 75.0p and 72.0p, so 10 pens for £7.20 is better value.
Answer: 10 pens for £7.20
Example 2

A team needs at least 62 pens. Pack A contains 15 pens for £10.50; Pack B contains 20 for £13.80. Using only one pack type, which option gives the lower total cost?

  1. Whole packs are required.
  2. Pack A costs 5 × £10.50 = £52.50.
  3. Pack B costs 4 × £13.80 = £55.20.
Answer: Pack A, £52.50
4 · ELEVENSPRINT TIP

A useful shortcut

Account for whole packs when the required quantity cannot be split.

5 · COMMON MISTAKES

Watch out for these

6 · TRY IT YOURSELF

Three fresh questions

Ready to check the method? You will get three fresh, validated questions.