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

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

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

How many four digit numbers can be formed using the digits 4,5,6,7,8 if repetition of digits is not allowed?

How many three digit numbers can be formed by using the digits, 0,1,2,3 (repetition of digits is allowed)

Given the numbers 1,2,3,4,5. How many 5 digit numbers can be formed by using the above digits if repetition is allowed?

How many numbers can be formed fro the digits 1,2,3 and 9, if repetition of digits is not allowed?

How many 4-digit number can be formed with the digit 1, 2, 3, 4, 6 and 8 if repetition of digits is not allowed.

How any three digit odd numbers can be formed by using the digits 1,2,3,4,5,6 if,The repetition of digits is not allowed? The repetition of digits is allowed?

How many numbers can be formed from digits 1, 3, 5, 9 if repetition of digits is not allowed?

How many numbers can be formed from the digits 1,2,3 and 9, if repetition of digits is not allowed?