strings > integers

Hello, I'm new to this but it looks interesting and I'm having a play about.

How, after scraping a number of mathematical numbers from a site would I sort in order. Like this:

Scraped:
29
4
18
1
7

Would like it sorted in order like this:
1
4
7
18
29

Also, how would I then tell the system to determine the highest number from the results? eg, 29 is the highest.

Thank you!