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Balance Point

Stage: 4 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

For this problem you need to be familiar with the principle of moments.

Have a look at a problem called "Inside Outside" to explore this idea.

Then come and try this again.

Back with Balance Point :

How many possible arrangements were there to choose from?

How can you list these systematically, and efficiently eliminate anything that is already covered by another arrangement?