Select the option in which numbers are related in the same way as are the numbers of following set.
(3, 24, 80)
Answer & explanation
Correct answer: option 3
(2)2 – 1 = 3, (5)2 – 1 = 24, (9)2 – 1 = 80
Similarly,
(4)2 – 1 = 15, (8)2 – 1 = 63, (10)2 – 1 = 99