Find the number of all three-digited numbers, with distinct digits and with each digit odd.

How many three-digit numbers are there, with distinct digits, with each digit odd ?

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

The total number of 4-digit numbers is

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

Find the sum of all the four digit numbers which are divisible by 29.

Find the number of 4-digit numbersthat can be formed using the digits 1, 2, 3, 4, 5 if no digit is repeated. How many of these will be even?

Let a_(n) denote the number of all n-digit numbers formed by the digits 0,1 or both such that no consecutive digits in them are 0. Let b_(n) be the number of such n-digit integers ending with digit 1 and let c_(n) be the number of such n-digit integers ending with digit 0. Which of the following is correct ?

Find the sum of all odd numbers of four digits which are divisible by 9.

Find the sum of all five digit numbers ,that can be formed using the digits 1, 2, 3, 4 and 5 (repetition of digits not allowed)