"Now transfer the last digit to the front and add the new number to the old one.For example, 1234+4123= 5357. Now tell me the results.
The results were told by each of the four children as follows:
Barry: 2348 Maury: 7847 Jaypee: 11847 Derrick: 9846"Everyone except one is wrong" Ned told the gathering.
Who was it and how did Ned know?