www.popsci.com/technology/article/2012-09/infographic-day-fastest-way-crack-4-digit-pin-number

Sep 20, 2012 ... Good ol' 1234 accounts for about 10 percent of passwords. That's more than the
bottom 4200 combinations put together.

mathcentral.uregina.ca/QQ/database/QQ.09.01/laura1.html

Are you to produce a list of all the 4 digit combinations or just count how many
there are? Harley. No, the digits can be repeated. You can start with any number
...

mathcentral.uregina.ca/QQ/database/QQ.09.06/s/kathy1.html

different combinations for 4 digits that cannot be the same, i.e. 0123. Can you ...
Order matters (0123 is different from 2013) so the number of choices is 10P4:.

www.mathplanet.com/education/algebra-2/discrete-mathematics-and-probability/permutations-and-combinations

A code have 4 digits in a specific order, the digits are between 0-9. How many
different permutations are there if one digit may only be used once? ... told in the
question that one digit only may be used once it limits our number of
combinations.

www.reference.com/math/many-combinations-can-made-four-numbers-e2ae81e7072bc2b4

There are 10000 combinations of four numbers when numbers are used multiple
... That is, the number of possible combinations is 10*10*10*10 or 10^4, which is
... To calculate the number of combinations in which each digit is used only ...

www.reference.com/math/many-combinations-numbers-can-made-four-digits-0000-9999-4b3f06731d59ceb5

10000 numbers can be made from combinations of four digits from 0 to 9. The
formula for counting the number of combinations is 10^4, or 10 x 10 x 10 x...

l33tn3rdz.deviantart.com/art/All-possible-4-digit-PIN-Numbers-0000-9999-hax-436606629

Feb 25, 2014 ... Every possible 4 digit PIN Number in the world: 0000 0001 0002 0003 0004
0005 0006 0007 ... There are WAAAAY too many combinations.

www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.541021.html

SOLUTION: if i have ten digits (0-9) how many 4 digit codes can i make? ... This is
a combination problem. Really you are looking for ... The problem doesn't say
you can't reuse a number, so you have 10 options for each spot. (10-10-10-10)

www.datagenetics.com/blog/september32012/

If you had to make predication about what the least commonly used 4-digit PIN is,
... (Statistically, with 10,000 possible combination, if passwords were uniformly ...
It appears that many people have an easy to type/remember PIN number for ...

www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.691193.html

You can put this solution on YOUR website! There are 4 ways to choose the first
digit. For each of those 4 ways, that leave 3 ways to choose the second digit.