Question

A secret code must consist of three capital letters followed by a digit. Letters cannot be repeated. How many secret codes are possible?

Answer 1

The answer is 156,000.

Answer 2

There are 36 values (26 letters of the alphabet + all numbers 0-9) and four digits. If there are only 10 values and four digits there are 10,000 combinations. So multiple the value of that by 3.6 and you get your answer. 36,000