Hello,
I'm getting confused lately with this singular/plural thing. Let's say I'm a supervillain who wants to blackmail the world leaders. Should I ask for "one hundred billion dollars" or "one hundred billionS dollars"? I've got a feeling it's the former, but why? Also, it's getting more confusing as I think about it. Why two hundred dollars and not two hundredS? But OTOH, hundreds of hundreds of killer vampires? ThousandS of fiery flaming wasps, but six thousand chilly icy wisps?
Also, is "All of them have to clean their nose afterwards" (because each of them has only one nose), or "All of them have to clean their noses afterwards" (which sounds like each of them has more than one nose (or is that "more than one noseS"? Argh!)).
Thank you

Ray