Does 1 billion equal 10 million?

Answer 1

No.

Depending upon where you are:

• 1 billion = 1 million million = 1,000,000 million (using the long scale); or
• 1 billion = 1 thousand million = 1,000 million (using the short scale).

Answer 2

No. A billion - as the word is used in the United States at least - is a thousand million. In some other countries, a billion means a million million.