If you have 10 numbers 0 - 9... and a 4 digit password... how many combinations can you have?
It depends on whether you are allowed to reuse numbers in the password. If you are then you can have more combinations.
If you cannot reuse digits then the following applies:
You can have any 1 of 10 digits for the first character, any 1 of 9 digits for the second, 1 of 8 for the third and 1 of the remaining 7 unused digits for the fourth.
The number of combinations is given as follows:
10 x 9 x 8 x 7 = 5040 combinations
I'm assuming its a pin number where you can reuse numbers so............
1 x 1 x 1 x 1 = 1
__ __ __ __ ______
10 10 10 10 = 10,000
So the andswer is a one in ten thousand chance of getting it right.
It takes approximately 75 seconds to insert the cash card, type in a pin and have it rejected. Therefore it could take you 750,000 seconds to get the right pin number. Thats 12.500 minutes or 208 hours or 8 1/2 days solid. You'd collapse through sleep deprivation or dehydration long before then. So it's not worth the effort.
It's all academic anyway as your only get three goes before the machine eats ther card. So in reality your chances are a 1 in ten thousand divided by three or a one in three thousand three hundred and thirty three and a third chance. ;)
:blink:
cheers :)