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You may like to look at Are you well Balanced? before trying this problem.
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I hang three weights on the 8 hook on the left-hand side of the equaliser.
If I have a maximum of four weights left, where could I hang them on the right-hand side of the equaliser so that it balances?
Are there any other ways of doing it? (I don't need to use all four weights.)

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Now I hang three weights on the 10 hook and one on the 6 hook on one side of the equaliser.
If I have six weights, where could I hang them on the other side to make it balance?