Question

[Kim Moonyul]

John wrote a 3-digits number on a piece of a paper and asked Peter to guess it. Peter asked:"Is the number 173 ?".John replied:"One of the digits is correct, the position of that difiy is also correct". Peter asked again:"Is the number 123 ?". Two digits are correct, but the position of those digits are wrong." Peter asked again:"Is the number 324 ?". All three  are correct , but the digits are all in the wrong places." What is the number written by John ?

Help me. Ai đúng tớ tick với KB nhé

Answer 1

[Nguyễn Hà Chi]

173 - 1 digit correct

      -  position correct

132 - 2 digits correct

      - both positions wrong

524 - 2 digits correct

       - both positions correct

Answer is 523

Answer 2

[Kim Moonyul]

Thanks