Answer
Pattern: -11 is added to the previous term.
The next two terms: 55, 44
Work Step by Step
The sequence: 99, 88, 77, 66,...
Finding the pattern:
Difference between 1st and 2nd term:
2nd term-1st term=Difference
88-99=-11
Difference between 2nd and 3rd term:
3rd term-2nd term=Difference
77-88=-11
Difference between 3rd and 4th term:
4th term-3rd term=Difference
66-77=-11
-11 is being added to the previous term each time.
Finding the next two terms:
Fifth term= Fourth term - 11
= 66 - 11
= 55
Sixth term= Fifth term - 11
= 55 - 11
= 44
Therefore the next two terms are 55 and 44
