Math Club – Magical April

DIY Challenge 2

Look at all the ways that we have found for making 3 groups of 9 cards.

What are some observations you can make? Why do think that is happening? An example is shown below. Come up with as many observations as you can.

ObservationPossible Reason
Sum of numbers in each group is 15Sum from 1 to 9 is 45. Three equal groups will mean 45 divided by 3, which is 15.
9 and 8 are never in the same group.?
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