Sum to infinity

1. 1.
   Find the sum to infinity of 28 + 285 + 2825 + …
2. 2.
   Find the sum to infinity of 27 + 274 + 2716 + …
3. 3.
   Find the sum to infinity of 8 + 85 + 825 + …
4. 4.
   Find the sum to infinity of 11 + 223 + 449 + …
5. 5.
   Find the sum to infinity of 24 + 245 + 2425 + …
6. 6.
   A geometric series has common ratio r = 32. Does it have a finite sum to infinity?
   a)Yesb)No
7. 7.
   A geometric series has common ratio r = 12. Does it have a finite sum to infinity?
   a)Yesb)No
8. 8.
   Find the sum to infinity of 3 + 94 + 2716 + …
9. 9.
   Find the sum to infinity of 15 + -152 + 154 + …
10. 10.
    A geometric series has common ratio r = 1. Does it have a finite sum to infinity?
    a)Yesb)No
11. 11.
    A geometric series has common ratio r = -34. Does it have a finite sum to infinity?
    a)Yesb)No
12. 12.
    Find the sum to infinity of 12 + 9 + 274 + …
13. 13.
    Find the sum to infinity of 40 + -403 + 409 + …
14. 14.
    A geometric series has common ratio r = 1.1. Does it have a finite sum to infinity?
    a)Yesb)No
15. 15.
    Find the sum to infinity of 6 + 92 + 278 + …
16. 16.
    Find the sum to infinity of 4 + 3 + 94 + …
17. 17.
    A geometric series has common ratio r = 0.9. Does it have a finite sum to infinity?
    a)Yesb)No
18. 18.
    Find the sum to infinity of 8 + 4 + 2 + …
19. 19.
    Find the sum to infinity of 7 + 72 + 74 + …
20. 20.
    Find the sum to infinity of 5 + 103 + 209 + …

Free maths worksheets and practice: rocketdigits.com/learn/sum-to-infinity