Which of the following numbers will replace the question mark (?) in the given series?
17, 20, 60, 64, 256, 261, 1305,?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 1311.
Given series : 17, 20, 60, 64, 256, 261, 1305,?
The logic used here is:
(17 × 1) + 3 = 20; 20 × 3 = 60
(60 × 1) + 4 = 64; 64 × 4 = 256
(256 × 1) + 5 = 261; 261 × 5 = 1305
(1305 × 1) + 6 = 1311