Question

How many area codes (ABC) would be possible if the first 2 digits can be any number 1-9 & last digit can be any number 4-7? just type in the answer​

Answer 1

1st digit can be 1-9 which is 9 numbers

2nd digit can be 1-9 which is 9 numbers

3rd digit can be 4-7 which is 4 numbers.

Total combinations = 9 x 9 x 4 = 324