How many integers fall between $\sqrt7$ and $\sqrt{77}$ on a number line?
I know that $\sqrt7$ is approximately 2.6, since 2.6 squared is 6.76, and $\sqrt{77}$ is approximately 8.8, since 8.8 squared is 77.44. Therefore, the integers that fall between them are 3, 4, 5, 6, 7, and 8. There are 6 of them. 