Find the total number of 9-digit numbers which have all different digit

Find the number of 4-digit numbers that can be formed using the digits 1, 2, 4, 5, 6, 8 if (a) digits can be repeated (b) digits cannot be repeated

Find the total number of numbers divisible by 2 which can be formed with six digits 1, 2, 4, 5, 6, 7.

The number of 7 digit numbers which can be formed using the digits 1, 2, 3, 2, 3, 3, 4 is

The number of all four digit numbers with distinct digits is

Find the number of 6-digit numbers using the digits 3,4,5,6,7,8 without repetition. How many of these numbers are (a) divisible by 5 (b) not divisible by 5

Find the number of 5-digit telephone numbers having at least one of their digits repeated.

The number of 3-digit numbers which can be formed from given five non-zero distinct digits, which are not repeated is