6x6x6x6 or 1296
If the digits can repeat, then there are 256 possible combinations. If they can't repeat, then there are 24 possibilities.
Forgot my password
6 x 7 = 42 (it helps to know the multiplication tables), so the prime factors are 2 x 3 x 7, and the combination is 237
30.The first digit can be one of three digits {3, 6, 9} corresponding to the last digit being {1, 2, 3}, and for each of those three digits, the middle digit can be one of ten digits {0 - 9}, making 3 x 10 = 30 such numbers.It is assumed that a 3 digit number is a number in the range 100-999, excluding numbers starting with a leading zero, eg 090 is not considered a 3 digit number (though it would be a valid 3-digit number for a combination lock with 3 digits).
The short answer is 1000. This is very easy to visualise: Simply consider each number in the combination to be a digit in a decimal number. We then end up with a three-digit number. Such a three-digit number ranges in value from 000 to 999, or 1000 unique combinations.
Assuming each "digit" actually has 10 different states, there are one million combinations possible in a six-digit combination lock. However, many combination lock designs actually have fewer than 10 different states per "digit", resulting in far fewer actual combinations on such locks.
There are 3024 ways.9 choices for the first digit,8 choices for the second digit (you can't repeat the one you just used),7 choice for the 3rd digit,6 choice for the last digit.9x8x7x6 = 72x42 = 72(40+2) = 2880+144 = 3024.
125
10x9x9x9
6,720 combinations.
If the digits can repeat, then there are 256 possible combinations. If they can't repeat, then there are 24 possibilities.
A four digit lock can have as it's combination any number between 0000 and 9999, or a total of 10,000 variations. Good luck guessing one.
A Master lock is no different from any other lock. Using shims if it's a padlock, or picking it traditionally will open a Master lock the same as any other lock. In fact, Master locks are fairly easy to pick.
You are not using the digit zero (0), so there are nine possible digits. If repetition is allowed and order is important (like a 4 digit combination lock), then the answer is 94 = 6561. If repetition is not allowed and order is important, then you have 9! / (9-4)! = 9*8*7*6*5 = 3024.
Forgot my password
# no # no # no # no # no # no # no # no # no # no # no # heck no
By default the lock code is the last 4 digits of your phone number.