Score will appear here.

Discuss with your friends and teacher the strategies you could use when estimating a number of items.

**Extension activities:**

Copy and paste your table of results into a spreadsheet then investigate the following:

- What is the average time it took you to make your estimate?
- Is your estimate more likely to be higher or lower than the actual number of items?
- Is there a correlation between the number of items and your percentage error?
- Can you work out the formula the computer uses to calculate your score?
- Can you get better at estimating with practice?

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