Question

15 9 8 12 36 170
19 (a) (b) (c) (d) (e)
What will come in place of (b)?

• A. 18
• B. 16
• C. 22
• D. 24
• E. None of these

Answer 1

The correct option is B 16

As
$15\times 1-1\times 6=15-6=9$
$9\times 2-2\times 5=18-10=8$
$8\times 3-3\times 4=24-12=12$
$12\times 4-4\times 3=48-12=36$
$36\times 5-5\times 2=180-10=170$
Similarly,
(a) $\Rightarrow 19\times 1-1\times 6=19-6=13$
(b) $\Rightarrow 13\times 2-2\times 5=26-10=16$