How many four digit numbers are there ?

How many 4-digit numbers are there with no digit repeated?

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

How many 3-digit numbers are there without repetition?

How many four-digit numbers can be formed by using the digits 1, 2, 3, 4, 5, 6, 7 if at least one digit is repeated.

How many 4 digits numbers can be formed from the digits 1 to 9 if not digit can be repeated.

How many three digit numbers leave remainder 2 when divided by 9. Also find their sum.

How many two-digit numbers are divisible by 3?

How many different 4-digit numbers can he formed from the digits 2, 3, 4 and 6 if each digit is used only once in a number ? Further, how many of these numbers : end in a 4 ?