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

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

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

How many four-digit numbers can be formed by using the digits 1, 2, 3, 4, 5, 6, 7 if at least one digit is repeated.

How many 3 digit even numbers can be formed from the digits 1, 2 , 3, 4, 5 and 6 assuming that repetition of the digits is allowed .

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

How many 3-digit even numbers can be made using the digits 1, 2, 3, 4, 6, 7, if no digit is repeated?

How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that repetition of the digits is allowed?