Even though we have finished our maths exam, we can still learn and have fun at the same time. Today we investigated adding sets of three numbers chosen from 1, 4, 7 and 10. All the possible combinations are shown on the board above, unless we missed any! We found that the totals are always multiples of 3. This happens because the difference between the numbers is 3, and we chose three numbers. Can you work out how to get multiples of 4? Hint: start with different numbers, and choose four of them instead of three.
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