How many seven-digit phone numbers are available in area code 837 if no phone number can begin with 0 and 1?

Name: How many seven-digit phone numbers are available in area code 837 if no phone number can begin with 0 and 1?
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Question

Quizplus · Accepted Answer

There are 8 choices (2-9) for the first digit and 10 choices (0-9) for each of the remaining six digits, resulting in 8 * 10^6 = 8,000,000 possible phone numbers.

How Many Seven-Digit Phone Numbers Are Available in Area Code