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Sharon, You should first fill in the three corners. Note that the sum of the three side totals will equal 3 times 57, which is 171. What is the sum of the given nine numbers? How much more do you need from the three corners (which each appears twice in forming the grand total of 171) to reach 171? Which three numbers in the given list sum to that missing quantity? Chris | |||||||||||||||||||||||||||||
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Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. |