Select the option that is related to the third number in the same way as the second number is related to the first number.
3 : 20 :: 7 : ?
Answer & explanation
Correct answer: option 3
The pattern followed here is:
3 : 20 → 3 : (32 + 1) × 2 = 20
Similarly,
7 : ? → 7 : (72 + 1) × 2 = 100
Hence, ‘100’ is the correct answer