Now, your problem is a bit sneaky because you don't have a very long string of numbers before a hole appears in the sequence, but you have a sequence of gaps that looks like: 7, 19, ?, ?, 91. read more
, 9. The order of numbers is going down or descending. The difference between numbers is 30 - 23 = 7; Since the order is descending subtract 7 from 23. The missing number may be 16. read more