List

Algebra

Diagonal Sums
problem

Diagonal sums

Age
7 to 14
Challenge level
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In this 100 square, look at the green square which contains the numbers 2, 3, 12 and 13. What is the sum of the numbers that are diagonally opposite each other? What do you notice?

Price Match
problem

Price match

Age
7 to 11
Challenge level
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Can you find pairs of differently sized windows that cost the same?

Different Deductions
problem

Different deductions

Age
7 to 11
Challenge level
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There are lots of different methods to find out what the shapes are worth - how many can you find?