How many different numbers of 4 digits can be formed from the digits 0, 1, 2, ...9 if repetition is allowed, not allowed.

How many different numbers of six digits can be formed from the digits 0,4, 5,7, 8, 9 with , repetition of digits is not allowed.

How many numbers can be formed from the digits 1, 2, 3, 4 when repetition is not allowed?

How many 2 digit even numbers can be formed from the digits 1, 2, 3, 4, 5 if the digits can be repeated?

How many 4-digit numbers can be formed by using the digits 1 to 9 if repetition of digits is not allowed?

How many odd numbers less than 1000 can be formed by using the digits 0, 3, 5, 7 when repetition of digits are not allowed.

How many three- digit numbers, which are divisible by 5, can be formed using the digits 0,1,2,3,4, 5 if (i) repetition of digits are not allowed ? (ii) repetition of digits are allowed ?