Explanation

The series follows the rule 'multiply by 2 and add 2': 6 x 2 + 2 = 14, 14 x 2 + 2 = 30, 30 x 2 + 2 = 62, 62 x 2 + 2 = 126. The fourth term should therefore be 62, but 64 is given, so 64 is the wrong number.