Difficult maths puzzle. Not for the faint hearted.

[engstrom0304]

Hey guys.

So who can calculate how many combinations are possible on the Android pattern unlock screen..

Things to consider...

1. Once a dot has been used, it can be recrossed.
2. Patterns must use a minimum of 4 dots
3. "semi-diagonal" swipes are possible.. Ie.. If for [row, column], you could go from [1,1] to [2,3]

Good luck.

 

[Theophany]

69.

e: remainder 1.

e2: slug is faget.

 

[JackG4]

This blows my brain

I'm going for a rough guess at 400,000 though

 

[Zethor]

This blows my brain

Does it provide steak too?

 

[Burnsy2023]

The combinations for 4-to-9-point paths are respectively 1624, 7152, 26016, 72912, 140704, 140704.

http://stackoverflow.com/questions/6979524/android-lock-password-combinations

 

[Mat]

389112

 

[JackG4]

Does it provide steak too?

Every Tuesday, Thursday, Saturday and 14th March. approx

 

[Burnsy2023]

389112

Nope, that still includes many invalid combinations. My link explains why it's lower.

 

[Gammawolf]

Nope, that still includes many invalid combinations. My link explains why it's lower.

But that number is the sum of your numbers? Which is the total amount of combinations you can have.

 

[The Dread Pirate]

Do your own homework!

 

[Burnsy2023]

But that number is the sum of your numbers? Which is the total amount of combinations you can have.

My bad, I misread.