Select the number from among the given options that can replace the question mark (?) in the following series.
7, 13, 28, 55, 112,?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 223.
7 × 2 - 1 = 13; 13 × 2 + 2 = 28; 28 × 2 - 1 = 55; 55 × 2 + 2 = 112; 112 × 2 - 1 = 223