Hacking a Safe Lock after 3 tries
$begingroup$
My friend has a safe lock, with a numeric password of 4 digits (varying between 0-9 each). She lost the password and looked for my help. Fortunately, I was able to hack it. I could try some different combinations and check how many numbers I got right.
I tried the number 8086 => Only 1 number is right, but in the wrong position.
I tried the number 8857 => Only 1 number is right, but in the wrong position.
I tried the number 0159 => You got 3 numbers right, all in the correct position.
And then the hack stopped working. If I insert just one wrong number, the safe lock will break.
Am I able to open this lock with the information provided by my hack? If so, what is the password?
combinatorics mastermind
asked yesterday
ChaoticChaotic
542214
$endgroup$
add a comment |
$begingroup$
My friend has a safe lock, with a numeric password of 4 digits (varying between 0-9 each). She lost the password and looked for my help. Fortunately, I was able to hack it. I could try some different combinations and check how many numbers I got right.
I tried the number 8086 => Only 1 number is right, but in the wrong position.
I tried the number 8857 => Only 1 number is right, but in the wrong position.
I tried the number 0159 => You got 3 numbers right, all in the correct position.
And then the hack stopped working. If I insert just one wrong number, the safe lock will break.
Am I able to open this lock with the information provided by my hack? If so, what is the password?
combinatorics mastermind
asked yesterday
ChaoticChaotic
542214
$endgroup$
add a comment |
$begingroup$
My friend has a safe lock, with a numeric password of 4 digits (varying between 0-9 each). She lost the password and looked for my help. Fortunately, I was able to hack it. I could try some different combinations and check how many numbers I got right.
I tried the number 8086 => Only 1 number is right, but in the wrong position.
I tried the number 8857 => Only 1 number is right, but in the wrong position.
I tried the number 0159 => You got 3 numbers right, all in the correct position.
And then the hack stopped working. If I insert just one wrong number, the safe lock will break.
Am I able to open this lock with the information provided by my hack? If so, what is the password?
combinatorics mastermind
asked yesterday
ChaoticChaotic
542214
$endgroup$
My friend has a safe lock, with a numeric password of 4 digits (varying between 0-9 each). She lost the password and looked for my help. Fortunately, I was able to hack it. I could try some different combinations and check how many numbers I got right.
I tried the number 8086 => Only 1 number is right, but in the wrong position.
I tried the number 8857 => Only 1 number is right, but in the wrong position.
I tried the number 0159 => You got 3 numbers right, all in the correct position.
And then the hack stopped working. If I insert just one wrong number, the safe lock will break.
Am I able to open this lock with the information provided by my hack? If so, what is the password?
combinatorics mastermind
combinatorics mastermind
asked yesterday
ChaoticChaotic
542214
asked yesterday
ChaoticChaotic
542214
asked yesterday
ChaoticChaotic
542214
asked yesterday
ChaoticChaotic
542214
asked yesterday
ChaoticChaotic
542214
542214
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
I think the correct password is
0179
Reasoning
Combining the second and third clues tells us that '5' is not in the combination, otherwise it would be in the correct position in the second combination. Therefore, 0, 1, and 9 are all in the correct position in the last combination. The first clue tells us that the third digit is not 8. Using the second clue again, the only remaining option is 7.
answered yesterday
hexominohexomino
43.3k3129207
$endgroup$
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
I think the correct password is
0179
Reasoning
Combining the second and third clues tells us that '5' is not in the combination, otherwise it would be in the correct position in the second combination. Therefore, 0, 1, and 9 are all in the correct position in the last combination. The first clue tells us that the third digit is not 8. Using the second clue again, the only remaining option is 7.
answered yesterday
hexominohexomino
43.3k3129207
$endgroup$
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
add a comment |
$begingroup$
I think the correct password is
0179
Reasoning
Combining the second and third clues tells us that '5' is not in the combination, otherwise it would be in the correct position in the second combination. Therefore, 0, 1, and 9 are all in the correct position in the last combination. The first clue tells us that the third digit is not 8. Using the second clue again, the only remaining option is 7.
answered yesterday
hexominohexomino
43.3k3129207
$endgroup$
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
add a comment |
$begingroup$
I think the correct password is
0179
Reasoning
Combining the second and third clues tells us that '5' is not in the combination, otherwise it would be in the correct position in the second combination. Therefore, 0, 1, and 9 are all in the correct position in the last combination. The first clue tells us that the third digit is not 8. Using the second clue again, the only remaining option is 7.
answered yesterday
hexominohexomino
43.3k3129207
$endgroup$
I think the correct password is
0179
Reasoning
Combining the second and third clues tells us that '5' is not in the combination, otherwise it would be in the correct position in the second combination. Therefore, 0, 1, and 9 are all in the correct position in the last combination. The first clue tells us that the third digit is not 8. Using the second clue again, the only remaining option is 7.
answered yesterday
hexominohexomino
43.3k3129207
answered yesterday
hexominohexomino
43.3k3129207
answered yesterday
hexominohexomino
43.3k3129207
answered yesterday
hexominohexomino
43.3k3129207
43.3k3129207
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
add a comment |
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Ah, sniped! Well done!
$endgroup$
– Matt
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Seconds away from beating you!
$endgroup$
– Greg
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
$begingroup$
Well done!! Got me too!
$endgroup$
– El-Guest
yesterday
add a comment |
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