As a teacher, I often find myself using combination locks to secure my personal belongings. Combination locks are a great way to keep your items safe as they require no key and can be easily reset to a new code.

## But how many numbers are in a master lock combination?

The answer is a three-digit code between 000 and 999, making 1,000 possible combinations. To break it down further, each of the digits can be any number from 0 to 9, which gives us a total of 10 options for each of the three numbers. This means that there are 10x10x10, or 1,000 possible combinations.

However, if you are using a standard combination lock with a range of 0-39, then the number of possible combinations will be much lower. This is because the range of possible numbers is only 40, giving you 40 different possible choices each time you turn the dial. This means that the total number of combinations would be 40x40x40, which equals 64,000.

It is important to note that the number of possible combinations is only relevant if you know the code to begin with. Without the code, the chances of randomly guessing the correct combination are incredibly small. Therefore, it is essential to choose a combination that is easy to remember but difficult to guess.

In conclusion, the number of possible combinations of a master lock combination depends on the range of numbers used. Standard locks with a range of 0-39 will have 64,000 possible combinations, while locks with a range of 000-999 will have 1,000 possible combinations. No matter which one you choose, be sure to choose a combination that is easy to remember but difficult to guess.