I've been trying to solve this but I still can't find the solution, could someone help me please?

4x3 grid, see transcription below


11 6 8
17 12 ?
25 34 19
19 28 11

and choices are

A. 13
B. 15
C. 16
D. 19

  • 4
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The answer is probably

C, 16


The difference between the two first numbers in the column equals the difference between the two last numbers in the column. F ex 17-11= 25-19 and 12-6=34-28 and lastely ?-8=19-11 --> ?=16

  • 1
    $\begingroup$ Nice, an alternative characterisation could be 1st-2nd+3rd=4th (equivalent) $\endgroup$ – hexomino Mar 15 at 11:13

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