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
77 78 159 472 1889 9446 56677
(1) 159
(2) 472
(3) 1889
(4) 56677
(5) 77
Question No : 2
2159 1967 1782 1611 1461 1339 1254
(1) 1967
(2) 2159
(3) 1461
(4) 1254
(5) 1611
Question No : 3
854 886 923 964 1007 1054 1107
(1) 923
(2) 1007
(3) 854
(4) 1054
(5) 1107
Question No : 4
53760 6720 960 160 80 8
(1) 8
(2) 80
(3) 960
(4) 6720
(5) 160
Question No : 5
80 120 300 1040 4725 25987.5
(1) 120
(2) 1040
(3) 4725
(4) 25987.5
(5) 300