How many (i) 5- digit (ii) 3- digit numbers can be formed by using 1,2,3,4,5 without repetition of digits.

How many two - digit numbers can be formed using 1,2,3,4,5 without repetition of digits ?

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

How many 3 digit odd numbers can be formed by using the digits 1,2,3,4,5,6 when the repetition of digits is allowed?

How many 5 -digit numbers divisible by 2 can be formed using digits 0,1,2,3,4,5 without repetition of digits.

How many 5-digit prime numbers can be formed using the digits 1, 2, 3, 4, 5 if the repetition of digits is not allowed?