The digits 1, 2, 3, 4, 5, 6, 7, 8 and 9 are to be written in the squares so that every row and every column of three squares has a total of 13. Two numbers have already been entered.
What is the value of ?
Select one option, then click Submit.
2
4
6
7
8
Select an option, then submit.
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Senior Mathematical Challenge 2006 (2006)
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