GRAPHS AND STATISTICS

Range

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

1 · WHAT YOU NEED TO KNOW

The idea

The range measures spread by comparing the greatest and least values.

Picture itCompare the highest and lowest values
2 · THE METHOD

Follow these steps

  1. Find the greatest value.
  2. Find the least value.
  3. Subtract least from greatest.
3 · WORKED EXAMPLES

See the method in action

Example 1

What is the range of these scores: 13, 20, 28, 32, 25?

  1. The greatest score is 32 and the least is 13.
  2. The range is 32 − 13 = 19.
Answer: 19
Example 2

The scores are 13, 20, 28, 32, 25. A new score of 40 is added. What is the new range?

  1. The least score remains 13, while the new greatest score is 40.
  2. The new range is 40 − 13 = 27.
Answer: 27
4 · ELEVENSPRINT TIP

A useful shortcut

Subtract least from greatest.

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.