Directions (Q.Nos. 1-4): in each of the following questions a number series is given which has only one wrong number. You have to find out the wrong number.
1.13, 16, 21, 27, 39, 52, 69 (3)
(1) 21
(2) 39
(3) 27
(4) 52
(5) 16
2.1500, 1581, 1664, 1749, 1833, 1925, 2016 (3)
(1) 1581
(2) 1664
(3) 1833
(4) 1925
(5) 1749
3.06, 91, 120, 153, 190, 233, 276 (2)
(1) 120
(2) 233
(3) 153
(4) 276
(5) 190
4.1331, 2197, 3375, 4914, 6859, 9261, 12167 (1)
(1) 4914
(2) 6859
(3) 9261
(4) 2197
(5) 12167