double, tirple,...

What's next?

single, double, triple, quadruple, quintuple, sextuple, septuple, octuple, nonuple, decuple...

The ones over quadruple aren't as commonly heard, however.

So Someone, what would you use instead of "the ones over quadruble"?

You wouldn't use them in regular conversation. If you say "nonuple", for example, you might not be understood. Instead of "The number of rabbits was nonupled.", you could say "The number of rabbits was multiplied by nine."

I agree....that's how rabbits are :-)

"You wanna tirple your reading speed, this course will help you. Call 48594848484848". Would you say that the course is gonna multiply your reading speed by 4?!!!LOL

Do they always say "treble" instead of "triple" in the UK?

No. Technically, it is multiplied by 3, but that's beside the point. BTW, it is "triple", not "tirple". Still, avoid using anything besides "single", "double", "triple", and "quadruple". The person you are talking to probably won't know the others. You can use any other way to indicate what you're saying.

If I hadn't learnt them in school, I wouldn't know the other forms! So Someone is right. The only bigger one perhaps people might know of is when referring to multiple births:

twins, triplets, quadruplets, quintuplets

Beyond the last, which itself is quite rare, most people don't have a chance to speak of sextuplets etc. And even then, I've heard people refer to quadruplets and quintuplets as "quads" and "quints" before.

Criostóir

Yes, it's true. I was born in with my four brothers, all together. We are all stuck together. We are Siamese.

Just joking, LOL.

"We are Siamese."

You mean "conjoined".

That must've been hard on your mother.

Ryan
We don't always say treble. It is very common. And if I personally were going to say something was multiplied by three, I would say trebled. If I was saying a phone number I might say three-triple-two, etc.