Question

$\begin{array}{cccc}7& 5& 19& \left(54\right)\\ 8& 6& 13& \left(61\right)\\ 9& 9& 19& (....)\end{array}$

• A. 90
• B. 100
• C. 120
• D. 70

Answer 1

Answer: (B)

100

Multiply the numbers in the first two columns and add the number in the third column to obtain the number as given in fourth column.
Hence, $7\times 5+19=54$
$8\times 6+1=61$
Thus, the missing number is:
$9\times 9+19=100$