Four digit numbers formed with `1, 2, 4, 6, 8` without repetition are formed in ascending order.Then the rank of `4618` is :

How many numbers can be formed with digits 2,4,6,8 without repetition ?

How many numbers can be formed with digits 3,4,6,and 8 without repetition ?

A five digit number is formed by the digits 1,2,3,4,5 without repetition.

Four digit numbers are formed by using the digits 1, 2, 3, 6 without repetition. The probability that a selected number is divisible by 3 is

What is the number of five-digit numbers formed with 0, 1, 2, 3, 4 without any repetition of digits ?