Let us do a fun activity. Take three piles of cards - one with 11 cards, second with 7 cards and the third with 6 cards and place them on a table.

The challenge is to move cards in a manner that each pile has 8 cards by the time you are done.

The rules are:

1) You can add to any pile but you must add exactly the amount of cards the pile already has. Suppose that a pile has 7 cards, then you will have to move exactly 7 cards from another pile to keep above it.

2) All cards should be taken from the same pile at one time.

3) You have only 3 moves.

First pile = 11
Second pile = 7
Third pile = 6

First move:
First pile = 11 - 7 = 4
Second pile = 7 + 7 = 14
Third pile = 6
Second move:
First pile = 4
Second pile = 14 - 6 = 8
Third pile = 6 + 6 = 12

Third Move:
First pile = 4 + 4 = 8
Second pile = 8
Third pile = 12 - 4 = 8

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