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

How many 3-digit numbers are there without repetition?

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

How many even numbers are there with three digits such that if 5 is one of the digits, then 7 is the next digit ?

How many 7-digit numbers can be formed, using the digits 1, 2, 0, 2, 4,2 and 4?

How many three-digit numbers can be formed without using the digits 0, 2, 3, 4, 5 and 6?

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

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?