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# Doughnut Percents

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This is one of a series of problems designed to develop students' team working skills. Other tasks in the series can be found by going to this article.

*Doughnut Percents - printable dominoes
Doughnut Percents - printable rule cards
Doughnut Percents - printable hint cards*

Every member of the team must end up with a set of four dominoes which join together to form a "doughnut" where touching ends have equal value. For example:

**The task is only successfully completed when everyone on the team has completed their domino doughnut.**

You will need to work in a team of four. If you have a fifth person available - use them as an observer (see guidance below).

Players pass dominoes to other team members in order to help one another complete their doughnut.

- Each member of the team starts with four dominoes in front of them.
- The dominoes in front of each person should be visible to everyone.
- Team members can only give dominoes; they cannot take dominoes from someone else.
- Each team member must have at least two dominoes in front of them at all times.
- No one can talk or give non-verbal signals to other members of the team.

Use an observer to check that the team obeys the rules and to keep a record of when members of the team help someone else (rather than, for example, when they just pass a piece on without looking at what the other person or team actually needs).

Observers can place one of the hint cards in the middle, if after a period of five minutes the team is not making any progress.