In a 3x3 magic square, the numbers 1 to 9 are arranged so that each row, column, and diagonal sums to the same number. What is that magic sum?
Category: Math · Difficulty: expert
Hint: Consider the average of the numbers involved.
Answer
15
Explanation
The magic constant can be calculated as (n(n^2 + 1))/2, where n is the number of rows (or columns). Here, n = 3, so the magic sum is 15.
This is a expert math riddle — one of the harder riddles here. The answer is 15.
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