Aptitude & Reasoning
Verbal Reasoning
Objective
Nov 23, 2012
Find the missing number
3 , 7 , 15 , 31 , 63 .....
Detailed Explanation
The series follow the given pattern.
(3 * 2) + 1 = 7
(7 * 2) + 1 = 15
(15 * 2) + 1 = 31
(31 * 2) + 1 = 63
(63 * 2) + 1 = 127
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