How many three digit numbers can be formed without using the digits 0,2,3,4,5 and 6?

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 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 5-digit numbers can be formed by using the digits 0, 1 and 2?

How many 6 digit numbers can be formed with the digits 1,3,3,0,1,2?

How many 6-digit numbers can be formed by using the digits 4, 5, 0, 3, 4, 5?

How many 7-digit numbers can be formed by using the digits 1, 2, 0, 2, 4, 2, 4?