Question : Directions: Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
8 : 32 :: 12 : 72 :: 18 : ?
Option 1: 180
Option 2: 234
Option 3: 208
Option 4: 162
Correct Answer: 162
Solution :
Given:
8 : 32 :: 12 : 72 :: 18 : ?
Second number = (First number) × (First number ÷ 2)
Like, 8 : 32→(8) × (8 ÷ 2) = 8 × 4 = 32
12 : 72→(12) × (12 ÷ 2) = 12 × 6 = 72
Similarly, for 18 : ?→(18) × (18 ÷ 2) = 18 × 9 = 162
So, 162 is related to 18. Hence, the fourth option is correct.