Question

The magic sum in the $3\times 3$ magic square with numbers 23, 24, 25, 26, 27, 28, 29, 30, 31 is ,

• A. 27
• B. 15
• C. 81

Answer 1

The correct option is C 81

The middle number in the given set of numbers 23, 24, 25, 26, $\underset{–}{27}$, 28, 29, 30, 31 is 27.

For $3\times 3$ magic square, we should multiply the middle number with 3 to find the magic sum.

$\therefore$ Magic sum $27\times 3=81$