Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to the third term.
121: 10:: 256: 15:: 441:?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 20.
The logic used here is:
121: 10
10 + 1 = 11
112 = 121
256: 15
15 + 1 = 16
162 = 256
Similarly,
441:?
20 + 1 = 21
212 = 441
Hence, 20 is the correct answer.