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Mathematical puzzle question 003

I saw this question on Math group and tried to solve it question to no avail. I approached it by taking the square of the first row, adding it to the second, then subtracting the fourth row from the result to get third row as answer, but I couldn't make any connection between the rows. Each time I try to make one but it doesn't suit for other columns. These questions belong to YÖS exam and I think the book is YÖS questions by Kuark publications. Thanks.

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1st column: 43 - 6^2 = 7

2nd column: 78 - 8^2 = 14

3rd column: 29 - 5^2 = 4

4th column: 58 - 7^2 = 9

So, the correct answer is A.

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    $\begingroup$ A is A. Imagine that. $\endgroup$ – Daniel Mathias May 30 at 0:56
  • $\begingroup$ @DanielMathias thanks for correcting me. $\endgroup$ – garakchy May 30 at 0:59
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    $\begingroup$ I wasn't correcting you. I did not notice the error in your post. I was simply observing that the question was "A=?" and the answer is "A". I found that amusing. $\endgroup$ – Daniel Mathias May 30 at 1:47

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