Year 8 Being curious

problem
Subtraction surprise

Age

7 to 14

Challenge level

Try out some calculations. Are you surprised by the results?
problem
Can they be equal?

Age

11 to 14

Challenge level

Can you find rectangles where the value of the area is the same as the value of the perimeter?
problem
How much can we spend?

Age

11 to 14

Challenge level

A country has decided to have just two different coins, 3z and 5z coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?
problem
Your number was...

Age

11 to 14

Challenge level

Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?
problem
What numbers can we make?

Age

11 to 14

Challenge level

Imagine we have four bags containing a large number of 1s, 4s, 7s and 10s. What numbers can we make?
problem
Stars

Age

11 to 14

Challenge level

Can you work out what step size to take to ensure you visit all the dots on the circle?
problem
Right angles

Age

11 to 14

Challenge level

Can you make a right-angled triangle on this peg-board by joining up three points round the edge?
problem
Who's the best?

Age

11 to 14

Challenge level

Which countries have the most naturally athletic populations?
problem
Non-transitive dice

Age

11 to 14

Challenge level

Alison and Charlie are playing a game. Charlie wants to go first so Alison lets him. Was that such a good idea?
problem
Estimating time

Age

11 to 14

Challenge level

How well can you estimate 10 seconds? Investigate with our timing tool.