by Colin McIntosh
How many is a billion? The answer may seem obvious, but the use of this word can lead to confusion. In the UK and Ireland the word traditionally meant the number 1,000,000,000,000 (a million millions), which is called a trillion in the United States. A billion in the United States is considerably smaller: only 1,000,000,000 (a thousand million). The system used in America is called the short scale, whereas that formerly used in Britain and Ireland is called the long scale.
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