What is a billion ? Is it:

- One thousand million, 10
^{9}, or 1,000,000,000;

- Or one million million, 10
^{12}, or 1,000,000,000,000 ?

EinsteinJr
May 9, 2015

#1**+8 **

Best Answer

1,000,000,000,000

http://www.oxforddictionaries.com/words/how-many-is-a-billion

MathsGod1
May 9, 2015

#2**+5 **

The American billion is 1,000,000,000; this was called, in Britain, until 1974, a *thousand million* or, more occasionnally, a *milliard*.

See Numberphile's video:

https://www.youtube.com/watch?v=C-52AI_ojyQ&index=39&list=PLt5AfwLFPxWLNZRKWlcRmTABh_SExiiCj

MrGenius
May 9, 2015

#3**+5 **

Yes in some countries a billion is 1 with 9 zeros and in others it is 1 with 12 zeros.

I think the 9 zeros is more common and it is the US one I believe.

MathsGod is British and I think that he is also correct. I think it England it is 1 with 12 zeros.

this is why scientific notation is so much better with very big and very tiny numbers :)

Melody
May 9, 2015

#4**+5 **

Thanks Melody, MrGenius and MathsGod1;

There are two systems: The short system, or short scale, and the long system, or long scale.

**In the short system:**

1,000,000,000 is a billion

1,000,000,000,000 is a trillion,

1,000,000,000,000,000 is a quadrillion, et caetera...

**In the long system:**

1,000,000,000 is *a thousand million* or, more occasionally, *a milliard* (I love this word )

1,000,000,000,000 is a billion

1,000,000,000,000,000 is a thousand billion or a *billiard *

and so on.

The short system has always been used in USA; it was officially adopted by UK in 1974.

But the long system is still used in almost every non-English-speaking countries in the World.

EinsteinJr
May 9, 2015