Find the number of odd positive numbers which have three digits.

Find the number of even positive integers which have three digits?

Find the number of even positive number which have five digits.

Find the number of n digit numbers, which contain the digits 2 and 7, but not the digits 0, 1, 8, 9.

Find the number of n digit numbers, which contain the digits 2 and 7, but not the digits 0, 1, 8, 9.

Find the number of odd positive three digit integers.

Find the number of three-digit numbers which are divisible by 5 and have distinct digits

Find the total number of 9-digit numbers which have all different digits.

The total number of 9 digit numbers which have all different digits is

Find the number of 5 digit numbers with different digits having middle term greatest and with non-zero digits?

The total number of 9-digit number which have all different digits is