The numbers 2, 3, 4, 5, 6, 7, 8 are to be placed, one per square, in the diagram shown so that the sum of the four numbers in the horizontal row equals 21 and the sum of the four numbers in the vertical column also equals 21.
In how many different ways can this be done?
Select one option, then click Submit.
0
2
36
48
72
Select an option, then submit.
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Senior Mathematical Challenge 2012 (2012)
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