There are 7 marbles in a circle. How could you get all 7 marbles ito a box by moving them in groups of only 2 or 3 at a time? You must follow this rule: Groups of 2 may ONLY move right,and groups of three may ONLY move left. How could you move all 7 marbles from a circle to a box?

Answer can not be too complicated!

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1. Is the box to the right or left of the circle?

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posted by Ms. Sue
2. The right.

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posted by CeCe 4gr
3. Move the first six in three moves (2 each time). That leaves 6 in the box and 1 in the circle.

Now move 3 from the box to the circle. Can you see what you'll do from there?

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posted by Ms. Sue
4. Thanks!

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posted by CeCe 4gr
5. You're welcome.

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posted by Ms. Sue
6. 82divided by 8

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posted by dakota

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