How many three-digit numbers can be formed using the digits 2, 3, 4, 5, 6 if digits can be repeated?

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

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

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

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

How many 10-digit numbers can be written by using the digits 1 and 2?