Ashu purchased seven distinct supercars and a garage with 10 consecutive spots numbered 0-9. He wants to keep at least two of spots 7, 8, and 9 open. How many ways are there for Ashu to arrange his cars? there are 10 spots available in the garage. The question has all information necessary to derive an answer.

A math teacher asks each student to create a password to gain access to her website. The password has 5 digits. She makes up some rules for the students to follow in their password selection. The first digit must be a multiple of 1. The second digit must be a multiple of 2. The third digit must be a multiple of 3, and so on. How many possible passwords are there?

There are only seven seats in a van. One of the seats is modified to fit only a baby and one is the driver's seat. The number of ways that six adults and a baby can be legally seated in the van if only 5 of the adults are licensed to drive is

A combination has 3 characters.  The first is a letter(26 letters A-Z), The second and third characters are numbers 0-9, but cannot repeat the same number.  How many possible combinations are there?