Directions (Qs.1 to 5): In each of the following questions a number series is given. In each series only one number is wrong that does not follow the given pattern of the series. Find out that wrong number.
Question No : 1
512 517 527 542 570 607
(1) 517
(2) 527
(3) 542
(4) 607
(5) 570
Question No : 2
15 31 61 123 247 491
(1) 31
(2) 61
(3) 123
(4) 247
(5) 491
Question No : 3
10 15 24 35 54 75 100
(1) 35
(2) 75
(3) 24
(4) 15
(5) 54
Question No : 4
539 566 597 636 691 780
(1) 691
(2) 780
(3) 566
(4) 539
(5) 636
Question No : 5
7 27 237 279 783 858
(1) 27
(2) 237
(3) 279
(4) 858
(5) 783