<h2>Find the code and unlock it.</h2>

                                      

Can you crack  the password and unlock the mobile phone?

 Alexander does not remember the password on his mobile phone.

But he has made a cryptographic note and finds it difficult

Try to find the code and help Alexander unlock the phone

 Crack the code  is a series of puzzles to turn your mind.


 It's a challenge for genius minds and to solve them you need to have reasoning skills and logical abilities.

 See the cryptographic note in the image below

The puzzle image has four  4-digit numbers.
Next to each number indicates how many numbers are correctly or incorrectly placed.

 Cracking  this code puzzle is a mental challenge and brain teaser.

 A mental challenge to develop logical abilities and reasoning skills.

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Write your answer as a comment below

 

See the answer and detailed solution By Panos Kalliantasis

 

From the hints 1 and 2
3 is not in the code since digit
3 it is in the same position and it
is atopo to be both right and
wrong.

From the hints 3 and 4
1 is not in the code since digit
1 it is in the same position and it
is atopo to be both right and
wrong.

From the hints 2 and 4
7 is not in the code
Ιf 7 is correct in hint 4 as the

fourth digit
then it cannot be correct in
hint 2
as the second digit.

From the hint 2
6734 

Two numbers are
correct and well placed
We proved that 3 and 7 are
not code digits, therefore 6 and 4
are correct and in the correct
positions
6 is the first digit of the code
4 is the fourth digit of the code

From the hint 4
We proved that 1,3,7 are not
code digits, therefore 8 is right
and in
the correct position
8 is the second digit of the
code.

From the hint 3
7916 one number is correct
but wrongly placed
We proved that 6 is right so
1,7,9 are wrong.

From the hint 1
2439 Two numbers are
correct but wrongly placed
We proved that 3 and 9 are
wrong,
therefore 2 and 4 are right.

The 4-digit code is:

6 8 2 4

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