Q. In the given series
1, 8, 3, 5, 1, 3, 7, 8, 1, 5, 7, 3, 5, 8, 3, 1, 5, 3, 7, 1, 8, 3, 5, 3, 7, 8, 3, 5, 1, 7, 3, 7, 5,
1, 8, 3, 1, 7, 1, 8, 3, 8, 5, 1How many times do the two consecutive (i.e. numbers one after the other) have a difference of 4?