Find terms of a geometric sequence

Each term is the one before times the common ratio.

1. Find the common ratio of the sequence −3, −9, −27, −81, …
2. Find the common ratio of the sequence 3, 6, 12, 24, …
3. Find the common ratio of the sequence −1, −2, −4, −8, …
4. Find the common ratio of the sequence 3, −6, 12, −24, …
5. A geometric sequence has a first term of −5 and a common ratio of 2. Find the 4th term.
6. A geometric sequence has a first term of −2 and a common ratio of 3. Find the 4th term.
7. A geometric sequence has a first term of −6 and a common ratio of −2. Find the 5th term.
8. A geometric sequence has a first term of −3 and a common ratio of 3. Find the 5th term.
9. A geometric sequence has a first term of 4 and a common ratio of 3. Find the 6th term.
10. A geometric sequence has a first term of 3 and a common ratio of 5. Find the 6th term.
11. A geometric sequence has a first term of 4 and a common ratio of 2. Find the 4th term.
12. A geometric sequence has a first term of 5 and a common ratio of 5. Find the 5th term.
13. Find the common ratio of the sequence 16, 40, 100, 250, … Write a fraction in lowest terms.
14. Find the common ratio of the sequence 48, −24, 12, −6, … Write a fraction in lowest terms.
15. Find the common ratio of the sequence 54, 18, 6, 2, … Write a fraction in lowest terms.
16. Find the common ratio of the sequence 162, 54, 18, 6, … Write a fraction in lowest terms.
17. Find the sum of the first 6 terms of the geometric sequence 3, −6, 12, …
18. Find the sum of the first 6 terms of the geometric sequence −3, 6, −12, …
19. Find the sum of the first 5 terms of the geometric sequence 4, 8, 16, …
20. Find the sum of the first 6 terms of the geometric sequence −2, 4, −8, …