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How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?
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These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?
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Try entering different sets of numbers in the number pyramids. How does the total at the top change?
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How can you change the area of a shape but keep its perimeter the same? How can you change the perimeter but keep the area the same?
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Can you find rectangles where the value of the area is the same as the value of the perimeter?
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15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
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Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?
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Can you find the squares hidden on these coordinate grids?
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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?
