How many numbers in all can be formed by using some or all of the ditgits 1,3,5,7 and 9, no digit being repeated?

How many numbers of four digits can be formed by using the digits 1, 3, 5, 7, 9, a digit being repeated any number of times in any number ?

How many numbers greater than 56000 can be formed by using the digits 4, 5, 6,7, 8, no digit being repeated in any number ?

How many different 6-digit numbers can be formed with the digits 0, 1, 3, 5, 7 and 9 ? (No digit being repeated.)

The number of numbers less than 1000 than can be formed out of the digits 0,1,2,3,4 and 5, no digit being repeated, as

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 numbers greater than 1000000 can be formed by using the digits 1, 2,0, 2,4, 2,4?

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

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

How many numbers between 20,000 and 30,000 can be formed by using the digits 2, 3, 5,6,7, if each digit may be repeated any number of times in any number ?

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