The number of five digit telephone numbers having at least one of their digits repeated is

The number of 3 digit number locks having none of their digits repeated is

The number of 4 digit natural numbers such that the product of their digits is 12 is

The number of five digit numbers in which all digits are even, is :

The number of five digit numbers in which all digits are even, is?

Find number of four-digit numbers in which repetition is not allowed. Also find number of four-digit numbers in which at least one digit is repeated.

The number of 5 digit numbers all digits of which are odd is

Count the numbers between 999 and 10,000 subject to the condition that there are . (i) no restriction . (ii) no digit is repeated . (iii) at least one of the digits is repeated .