Select the number from among the given options that can replace the question mark (?) in the following series.
56, 111, 221, 441, 881, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e 1761
The given series is: 56, 111, 221, 441, 881, ?
The logic used here is:
(56 x 2) - 1 = 111
(111 x 2) - 1 = 221
(221 x 2) - 1 = 441
(441 x 2) - 1 = 881
So, (881 x 2) - 1 = 1761
Hence, option 3 is the correct option.