I think it's simple but I just can't seem to do it! If six teenagers can gobble up 12 pizzas in an hour, how many teenagers will it take to eat 6 pizzas in an hour and a half? Any ideas? I'm getting 1 and a half teenagers, thus I'd guess it's 2. EDIT -> Yes the answer is 2. It was a moment of pure stupidity on my part, I tried to work it out using formulae that were not required, lol.