'Twenty' in the Bible

Or what king, as he goes to encounter another king in war, will not sit down first and consider whether he is able with ten thousand to meet him who comes against him with twenty thousand?

In these days, Peter stood up in the midst of the disciples (and the number of names was about one hundred twenty), and said,

They took soundings, and found twenty fathoms. After a little while, they took soundings again, and found fifteen fathoms.