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Sharing Sweets
problem

Sharing sweets

11 to 14
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Maria and Lucy spun a coin 30 times, and gave each other sweets depending on the outcome of the spin. How many times was tails spun?
Integral chasing
problem

Integral chasing

16 to 18
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Can you find the missing constants from these not-quite-so-obvious definite integrals?
Cuboid perimeters
problem

Cuboid perimeters

14 to 16
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Can you find the volume of a cuboid, given its perimeters?
Reverse ages
problem

Reverse ages

11 to 14
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When is the next time that Brian's age will be the reverse of his father's age?
Semicircle distance
problem

Semicircle distance

14 to 16
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Can you find the shortest distance between the semicircles given the area between them?
Four Go
problem
Favourite

Four go

7 to 11
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This challenge is a game for two players. Choose two of the numbers to multiply or divide, then mark your answer on the number line. Can you get four in a row?

Magic Vs
problem
Favourite

Magic Vs

7 to 11
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Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

Kite in a Square
problem
Favourite

Kite in a square

14 to 18
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Can you make sense of the three methods to work out what fraction of the total area is shaded?

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