Question

Can you crack the code? question in attached file.​

Answer 1

Step-by-step explanation:

Given :  options for key lock

2 9 1  - one number is correct  and well placed

2 4 5  - one number is correct but wrong placed

4 6 3  - Two numbers are correct but wrong placed

5 7 8   nothing is correct

5 6 9    one number is correct but wrong placed

To find : code to open lock

Solution:

2 9 1  - one number is correct  and well placed

2 4 5  - one number is correct but wrong placed

Hence 2 can not be correct number

5 7 8   nothing is correct  

so 2 , 5 , 7 & 8 are not the number in code

2 4 5  - one number is correct but wrong placed

2 & 5 are not correct

hence  4 is correct but wrong placed

4 6 3  - Two numbers are correct but wrong placed

Hence location of 4 is defined  as  1st & 2nd position are bot correct

and out of 6 & 3 one has to be correct

x   x   4

2 9 1  - one number is correct  and well placed

1 can not be well placed as last position is  already taken

hence 9 is correct & well placed

x  9   4

5 6 9    one number is correct but wrong placed

9 is the number

hence 6 can not be correct

so

out of 6 & 3  - 3 has to be correct

3 9 4  is the code

Hope this helps.