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In this puzzle, a number lock has 3 digit key and you will have to find out the correct combination to open the lock.

+1 vote
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In this puzzle, a number lock has 3 digit key and you will have to find out the correct combination to open the lock.
Can you solve this?
enter image description here

posted Apr 5, 2020 by Deepak Chitragar

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2 Answers

0 votes

042


Line 4- excludes 7, 3 & 8
Line 5- 0 is correct but wrongly placed
Line 3- 0 is correct-> goes to 1st place as wrongly placed in 2nd and 3rd place
Line 1 and 3- 2 is correct and well placed--> 3rd place --6 excluded
Line 2- 1 is excluded and 4 is correct- but wrongly placed-> 2nd place
We get key 042 as a result

answer Apr 5, 2020 by Hanifa Mammadov
0 votes

We have to select 3 digits from 0, 1, 2, 3, 4, 6, 7, & 8.
Analysing first two statements, digit 6 is ruled out. Then statement at No. 5, rules out digits 7, 3 & 8.
Since 6 & 8 are ruled out, according to statement 1, Digit 2 is one of the correct digits and is at the correct place.
According to the third statement, two numbers are correct but wrongly placed. Since number 6 is already ruled out, remaining numbers are 2 & 0. That means 0 comes in first place and 2 is already in the third place. Now we have to choose one number from out of 1, 3 & 4 which will be placed at No. 2 position. Since it is stated in the second statement that out of 6, 1 & 4, one number is correct but wrongly placed and since it is proved that No. 2 occupies the third position, only number remains is 4 and it must at number two position, the answer we arrive at is 042.

ANS: 042

answer Apr 12, 2020 by anonymous



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