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

How many three digit numbers are there with no digit repeated?

How many three digit numbers are there, with no digit repeated.

How many 6-digit numbers are there?

How many 7-digit numbers are there?

How many 7- digit numbers are there?

How many 4-digit numbers are there when a digit may be repeated an number of times?

How many six-digit numbers are there in which no digit is repeated, even digits appear at even places, odd digits appear at odd places and the number is divisible by 4 ?

How many three –digit numbers are there?

How many 3 digit numbers are there, with distinct digits, with each digit odd?

How many 3 digit numbers are there, with distinct digits, with each digit odd?