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Using the numbers from 9 to 17 construct a 3 × 3 magic square. What is the Magic sum here?

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Using the numbers from 9 to 17 construct a 3 × 3 magic square. What is the Magic sum here? What relation is there between the magic sum and the number in the central cell?

16 9 14
11 13 15
12 17 10
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Magic sum is 39
Central Number is 13
we have ⇒ 39 = 3 × 13
The magic sum is 3 times the central number

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