Find out the wrong number in the sequence
102, 101, 98, 93, 86, 74, 66, 53

here the given pattern is 102, 101, 98, 93, 86, 74, 66, 53

as we ca see that

102 - 101 = 1

101 - 98 = 3

98 - 93 = 5

93 - 86 = 7

as we can see that the difference between consecutive terms is increasing by 2 in every case but when we check

86 - 74 = 12 we see that the pattern is not getting fullfilled in case of 74 so in order to make the same pattern the term should be 77 inspite of 74 .

lets check with 77

86 - 77 = 9

hence it is confirmed that the wrong number is 74