MAGIC SQUARE: Calculate A+B-C
The aim is to place the some numbers from the list (11, 15, 16, 18, 19, 20, 22, 57, 58, 60, 69) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C.
The test
Two young engineers applied for a single position at a computer company.
They both had the same qualifications. In order to determine which individual to hire, the applicants were asked to take a test by the Department manager.
Upon completion of the test, both men missed only one of the questions.
The manager went to the first applicant and said, "Thank you for your interest, but we've decided to give the job to the other applicant."
"And why would you be doing that? We both got 9 questions correct," asked the rejected applicant.
"We have based our decision not on the correct answers, but on the question you missed," said the Department manager.
"And just how would one incorrect answer be better than the other?" the rejected applicant inquired.
"Simple," said the Department manager, "Your fellow applicant put down on question #5, 'I don't know.' You put down, 'Neither do I.'"