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"Lower Secondary"
The Olympic emblem consists of five overlapping rings containing nine regions.
Place the numbers 1, 2, 3, … 9 in the nine regions so that the total in each ring is the same.
Can you complete the solutions given in the 4 diagrams?
Choose four consecutive whole numbers, for example, 4, 5, 6 and 7.
Multiply the first and last numbers together (28).
Multiply the middle pair together (30).
Choose different sets of four consecutive whole numbers and do the same.
What do you notice about the difference between the two […]
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