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Rule of Three

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

Square Pegs

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

How Big?

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

Cereal Mix

Age 11 to 14 Challenge Level:

Dried apricots and nuts cost more than £5 per kg so any mix will need to contain seeds.

How does the quantity of nuts affect the quantity of seeds that will be required?

How does the quantity of dried apricots affect the quantity of seeds that will be required?