How many combinations to get into iphone?

that kid

I locked my self out of my notepad, now i really need the notes

The numbers are all differnt and do not repeat, it is a forur digit lock with the numbers in question being: 2, 3, 5, 6, 7, 8, 9

can you formulate a list?

or show me how too.either way i NEED to get in there lol

Mark

There are nPr(7, 4) = 840 different possible sequences of digits.

If you want to be systematic about trying them all, try them in ascending order:

2356
2357
2358
2359
2365
2367

Philo

7 choices for 1st digit times 6 choices for 2nd times 5 for 3rd times 4 for 4th,
840 combinations,

list low to high looks like
2356
2357
2358
2359
2365
2367
2368
2369
2375
and so on

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