In a city all telephone numbers have six digits. The first two digits are always 41 or 42 or 46 or 62. How many telephone numbers have all six distinct digits?

In a certain city, all telephone numbers have six digits, the first two digits always being 41 or 42 or 46 or 62 or 64. How many telephone numbers have all six digits distinct ?

In a certain city, all telephone numbers have six digits, the first two digits always being 41 or 42 or 46 or 62 or 64. How many telephone numbers have all six digits distinct ?

In a certain city, all telephone numbers have six digits , the first two digits always being 41 or 42 or 46 or 60 or 64. How many telephone number have all six digits distinct ?

How many four digit numbers are there with distinct digits?

How many four digit numbers are there with distinct digits?

In a certain city, all telephone numbers have six digits If repetition of digits is possible, how many telephone numbers are there in the city.

In a certain city, all telephone numbers have six digits How many telephone numbers are there with all digits distinct and which start with 41 or 42 or 46 or 62 or 64

The number of all numbers having 5 digits, with distinct digits is