I found this combination lock in a drawer. It has numbers 0-39 and as like any other I'm sure it needs 3 numbers. How many possible combiations and is it possible to open this in a year?
2007-06-28 12:40:13 · 9 answers · asked by Game-Guy Pro 5 in Science & Mathematics ➔ Mathematics
Ok, is there a website where I could find a list of all of these because it will take me a very long while to make one. And I have plenty of time to spair. Im at my grandmas house and have over 8 hours a day to waste.
2007-06-28 13:03:40 · update #1
40*39*38 (since you don't use the same number twice)= 59,280
If you google how to open one, you can dramatically decrease the number down. There are techniques to eliminate possibilities down to about 1,000.
2007-06-28 13:00:54 · answer #1 · answered by Anonymous · 0⤊ 0⤋
40*40*40 = 64000 combinations
Let's say each combination takes 10 seconds.
64000 / 365 = 175.3425 combinations/day
175.3425 * 10 = 1753.425 seconds/day
= 29.22 minutes/day
Keep in mind the expected time is a lot less than 29.22 * 365 minutes. That is the time it would take to try all the combinations, but the combination could be found much earlier than that. That's probability theory.
The real question is: Do you have a half an hour everyday to try opening a lock when you could just buy a new one for 5 dollars?
2007-06-28 12:59:47 · answer #2 · answered by whitesox09 7 · 0⤊ 0⤋
Feynman at Los Alamos; cracking Master locks all over the Web. In theory, 40^3 or 64,000 combinations. In practice, closer to 2,400 independent combinations given manufacturing tolerences. A Master lock can be opened from scratch in under an hour even if you are mostly thumbs.
2007-06-28 12:51:26 · answer #3 · answered by Uncle Al 5 · 0⤊ 0⤋
They tend to be a bit forgiving (manufacturing tolerances, as already stated) so you can cut it down a bit by dialing in between two numbers every time. It will often accept either number. But there's an easier way. Find someone with obsessive compulsive disorder and tell him a hot chick will come to visit if he can only find the right combination.
2007-06-28 13:04:22 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The key thing here to remember is that you can't pick the same number twice.
Since order does matter you have 40 choices for the first number, 39 for the second, and 39 for the last number, so it's
40 * 39 * 39 = 60840combinations
Can it be done? Well, it's depends on how much time you have on your hands =)
2007-06-28 12:45:56 · answer #5 · answered by kousuke51 2 · 0⤊ 2⤋
Turn the lock to the right a few times to reset the mechanism, then stop on 18, then go left past 8 once and land on 8 the second time at it, then turn right 6 digits to 2
2016-04-01 09:37:40 · answer #6 · answered by Anonymous · 0⤊ 0⤋
The combination for the lock can have 64,000 possible combinations. Its possible to open it in a year but that is if you don't get tired of it after the one thousand combination tried.
2007-06-28 12:59:22 · answer #7 · answered by Jose F 1 · 0⤊ 0⤋
40 combinations then either right or left is 80 combinations then multiply 40 more and 40 after that?
80*40*40 = 128 000
At 128 combinations per day tried, it takes 1000 days to try them all. Chances are you will hit it in half that time.
512 combinations per day could get you there in a year easy.
2007-06-28 12:49:37 · answer #8 · answered by Anonymous · 0⤊ 2⤋
Too many, toss it and buy another one they only cost about $2.
Mathamatics was not one of my strong suits in school! LOL I tend to use logic for stuff instead of odds.
2007-06-28 12:57:55 · answer #9 · answered by unknown friend 7 · 0⤊ 0⤋