If two additional toll-free area codes were made available, how many MORE toll-free telephone numbers would be possible?

Using any area code followed by a 7-digit number, 107, or 10,000,000, telephone numbers are possible. Originally, 800 was the only toll-free area code.

If two additional toll-free area codes were made available, how many MORE toll-free telephone numbers would be possible?
A . 107
B . 2 × 107
C . 3 × 107
D . 2 × 1014
E . 3 × 1014

View Answer

Answer: B