Complete the magic triangle with the magic sum of 21 using numbers 1 to 9.
3
? 4
2 ?
9 ? 1 6
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Solution
We know that, in Magic triangle each line has the same sum.
On the left side, 21-(9+2+3) = 7
On the right side, 21-(3+4+6) = 8
In the bottom line, 21-(9+1+6) = 5.
So the answer will be 7, 8, and 5.