How many 4 - digit numbers are there ?

How many 7- digit numbers are there?

How many 6-digit numbers are there?

How many 7-digit numbers are there?

(i) How many three - digit numbers are there, with no digit repeated ? (ii) How many four - digit numbers are there, with no digit repeated ? (iii) How many natural numbers from 1 to 1000 have none of their digits repeated ?

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

How many four digit numbers are there with distinct digits?

How many 3-digit numbers are there with no digit repeated?

How many 3-digit numbers are there with no digit repeated?

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