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

How many even numbers can be formed by using all the digits 2, 3, 4, 5, 6?

How many numbers with 6-digits can be formed from the digits 3,4,5,6,7,8, if no digit is repeated and divisible by 5?

Find the number of 4-digit numbers that can be formed using the digits 1, 2, 4, 5, 6, 8 if (a) digits can be repeated (b) digits cannot be repeated

How many 3-digit numbers can be formed from the digit 2, 4, 5, 6, 7 if no digit is repeated?

How many numbers greater than 24000 can be formed by using digits 1, 2, 3, 4, 5 when no digit is repeated?

How many distinct 5-digit numbers can be formed, using the digits 3, 4, 3, 4, 2?