Which of the following numbers will replace the question mark (?) in the given series?
2, 5, 11, 23, 47, ?, 191
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 95.
Given series: 2, 5, 11, 23, 47, ?, 191
2 × 2 + 1 = 5; 5 × 2 + 1 = 11; 11 × 2 + 1 = 23; 23 × 2 + 1 = 47; 47 × 2 + 1 = 95; 95 × 2 + 1 = 191