Find the one which is‘different from the rest three.
A series is given, with one term missing. Choose the correct alternativefrom the given ones that will complete the series.
6, 8 :: 2, 12 :: 5, 9 :: 4, ?
3, 5, 6, 11, 9, 17, 12, ?
2, 1, 2 = 5
3, 1, 1 = 4
?, 3, 1 = 7
A C D F G I J L M O P ?
2, 5, 7, 12, 19, 31, ?, 81.