Square roots (estimating)

Between which two integers does the square root lie?

1. 2 and 3

2.  5 and 6

3. 9 and 10

4. 5 and 6

5. 21 and 22

6. 17 and 18

7. 10 and 11

8. 31 and 32

9. 13 and 14

10 12 and 13

Find or approximate the square root.  Estimate to the nearest tenth.

11. 24

12. 13

13. 8.4

14. 7.1

15. 21

16. 31

17. 11.1

18. 11.6

19. 15

20. 19.1