Question

Find out the missing number if same rule is followed in all the three figures.

• A. 117
• B. 100
• C. 78
• D. 63

Answer 1

The correct option is C 78

$10\times 9-(4\times 8)$

$=58$

$12\times 13-11\times 20$

$=46$

$15\times 10-9\times 8$

$=78$

Option ${}^{\prime }{C}^{\prime }$ is correct.