1 out of 3
Can all unit fractions be written as the sum of two unit fractions?
1 out of 3
On the grid provided, we can draw lines with different gradients. How many different gradients can you find? Can you arrange them in order of steepness?
1 out of 3
A country has decided to have just two different coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?
1 out of 3
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
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How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?
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I'm thinking of a rectangle with an area of 24. What could its perimeter be?
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If you have only 40 metres of fencing available, what is the maximum area of land you can fence off?
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Can you find six numbers to go in the daisy from which you can make all the numbers from 1 to a number bigger than 25?
1 out of 3
Can you crack these cryptarithms?
1 out of 3
By selecting digits for an addition grid, what targets can you make?
