| a) | Fill in the squares in the box below so that |
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• the numbers across each row sum to the total at the end of the row, and • the numbers down each column also sum to the total at the bottom of the column. |
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Only the numbers 1 to 7 can be used. A number can be used more than once. |
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b) |
Fill in the squares in the box below so that |
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• each row adds to 3x + 3y, and • each column also adds to 3x + 3y. |
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