How many different positive integers can be formed using the digits 0, 1, 2 and 3 in which repetition of digits is not allowed?

How many non-zero numbers can be formed using the digits 0,1,2,3,4 and 5 if repetition of digits is not allowed?

How many non-zero numbers can be formed using the digits 0,1,2,3,4 and 5 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?

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

How many three-digit even numbers can be formed using the digits 1, 2, 3, 4 and 5 when 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?

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

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

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