Select the option that is related to the fourth term in the same way as the first term is related to the second term and the fifth term us related to the sixth term.
16 : 96 :: ? : 161 :: 18 : 120
Answer & explanation
Correct answer: option 2
16 : 96 :: ? : 161 :: 18 : 120
The logic followed here is :
{16 × ( 16 + 2 )} ÷ 3
= (16 × 18) ÷ 3
= 96
AND
18 : 120
{18 × ( 18 + 2 )} ÷ 3
= (18 × 20) ÷ 3
= 360
= 120
SIMILARLY
? : 161
{X × ( X + 2 )} ÷ 3 = 161
X2 + 2X = 483
X2 + 23X - 21X - 483 = 0
(X + 23) (X - 21) = 0
HERE X = - 23 AND X = 21