Question

you are asked to create a four-digit code using the numbers from 1 to 9. how many possible codes are there--assuming that numbers can be repeated?

Answer 1

The digits 0 through 9 can be put together in one of 10,000 different ways to create a four-digit code.

In order to only display passwords that were exactly four digits long [0-9], Berry examined passwords from previously leaked and exposed tables and security incidents. The digits 0 through 9 can be put together in one of 10,000 different ways to create a four-digit code. In order to determine which are least and most predictable, Berry examined them. He surmises that it wouldn't be unreasonable for consumers to choose the same four-digit PIN code for their four-digit bank account if they choose a four-digit password for an online account or other website.

There are five options to fill the position of ten. The hundredth position can be filled in 4 different ways because digits cannot be duplicated. The first position of a four-digit integer might be filled in one of three ways. You may create 60 four-digit numbers using the digits 2, 3, 5, 6, 7 and 9.

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