9C6 x 6! 60480
If repetition of numbers is not allowed then how many numbers of five digits can be formed by using 1,2,3,4,5. If 4 is necessarily taken at hundred's place and 2 is not allowed at unit's place
How many numbers of five digits can be formed by using 1,2,3,4,5, if 4 is necessarily taken at hundred's place and 2 is not allowed at unit's place. Repetition of number is not allowed.
How many different numbers can be made using only the digits 1, 2, 3, 4 and a + sign? For instance 31+24, or 1+243.
A five-digit number is formed using digits 1,3,5,8 and 9 without repeating any one of them. What is the sum of all such possible numbers?
