- Problem
- Solution

If it takes four men one day to build a wall, how long does it take 60,000 men to build a similar wall?

If the sides of the triangle in the diagram are 3, 4 and 5, what is the area of the shaded square?

At the beginning of the night three poker players; Alan, Bernie and Craig had money in the ratios 7 : 6 : 5. At the end of the night the ratio was 6 : 5 : 4. One of them won $1 200. What were the assets of the players at the beginning of the evening?

Which is a better fit, a square peg in a round hole or a round peg in a square hole?

In other words, which peg fills a greater proportion of its hole?

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice.

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NRICH is part of the family of activities in the Millennium Mathematics Project.

NRICH is part of the family of activities in the Millennium Mathematics Project.