can't do math for the life of me. HELP.

triassiic
Sun, 20 Oct 2013 16:32:26 +0000

Well it says that there are 25 buildings, but only says the room numbers for 10, 10, and 4. So what about the last one?

Also, I don’t understand how you got that “10 have fewer than 6 rooms, 10 have more than 7 rooms, so this tells you that 5 buildings have 6 or 7 rooms.”