(adsbygoogle = window.adsbygoogle || []).push({}); Cracking Master Combination Locks

I've come across the following information:

The three numbers in the combination to a Master Combination Lock have the following relationships:

The first number modulus 4 = the third number modulus 4;

and

The second number modulus 4 = (the third number modulus 4) +/- 2.

If this information is correct, the following tables showing possible numbers in a combination should be valid:

Code (Text):

Table 1

1st Number Possibilities 1 5 9 13 17 21 25 29 33 37

2nd Number Possibilities 3 7 11 15 19 23 27 31 35 39

3rd Number Possibilities 1 5 9 13 17 21 25 29 33 37

Table 2

1st Number Possibilities 3 7 11 15 19 23 27 31 35 39

2nd Number Possibilities 1 5 9 13 17 21 25 29 33 37

3rd Number Possibilities 3 7 11 15 19 23 27 31 35 39

Table 3

1st Number Possibilities 2 6 10 14 18 22 26 30 34 38

2nd Number Possibilities 0 4 8 12 16 20 24 28 32 36

3rd Number Possibilities 2 6 10 14 18 22 26 30 34 38

Table 4

1st Number Possibilities 0 4 8 12 16 20 24 28 32 36

2nd Number Possibilities 2 6 10 14 18 22 26 30 34 38

3rd Number Possibilities 0 4 8 12 16 20 24 28 32 36

The number of possible combinations to a Master Combination Lock is 64,000 ( = 40 x 40 x 40).

If the above four tables are valid, the number of possible, valid combinations is only 4,000 ( = 4 x (10 x 10 x 10)).

Still a considerable number; however, it's reduced by a factor of 16.

Before going further, I would like to confirm the above four tables show all valid, possible combinations to Master Combination Locks.

If you have a Master Combination Lock, would you compare the combination to the lock against possibilities in the tables?

Does the combination to your lock appear as a possibility in the tables?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Cracking Master Combination Locks

**Physics Forums | Science Articles, Homework Help, Discussion**