Question

$\begin{array}{ccc}4& 6& \left(25\right)\\ 3& 9& \left(36\right)\\ 8& 6& (....)\end{array}$

• A. 48
• B. 42
• C. 49
• D. 56

Answer 1

The correct option is C 49

The square of average of numbers in first two columns is equal to the third number.
Thus, ${\left(\frac{6+4}{2}\right)}^2=5^2=25$
${\left(\frac{3+9}{2}\right)}^2=6^2=36$
Hence, the missing number:${\left(\frac{8+6}{2}\right)}^2=7^2=49$