4 ms·
i am lost. how can a sequence of 3 digits be 4 digits long?
by salsadip 8y ago
i am lost. how can a sequence of 3 digits be 4 digits long?
- deleted 8y ago[deleted]
- alexsb92 8y agoWhere does it say it has to be 4 digits long? Most PINs are I guess, but you could have 3 digit pins just as easily.
- kevinwang 8y agoThey're saying that 1000 was also a choice on the multiple choice test
- salsadip 8y agoi can't read. thank you
- deleted 8y ago[deleted]
- wlamond 8y agoHe's saying there are 1000 possible PINs (000-999) if you don't have the unique digit constraint.
- kiallmacinnes 8y agoIt asked how many possible choices are there, 000 through 999 is 1000 choices, just as there are 10 numbers between 0 and 9 inclusive. (Yes, the Q also said each digit must be unique, hence the real answer is 720). Anyway - IMO this is a terrible question.