In the array of numbers below, each number above the bottom row is equal to three times the number immediately below it. What is the value of x+y?

        27      x     81     -108
        9      -18    27     -36
        3      -6     y      -12
        1      -2     3      -4 

closed as off-topic by Bass, Excited Raichu, gabbo1092, Glorfindel, JonMark Perry Nov 30 '18 at 14:29

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question is off-topic as it appears to be a mathematics problem, as opposed to a mathematical puzzle. For more info, see "Are math-textbook-style problems on topic?" on meta." – Bass, Excited Raichu, gabbo1092, Glorfindel, JonMark Perry
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  • 1
    $\begingroup$ This seems extremely simple and not really a puzzle... $\endgroup$ – gabbo1092 Nov 30 '18 at 13:55
  • 1
    $\begingroup$ Too simple for a puzzle, took me about 20 sec to calculate the answer $\endgroup$ – Eugene Anisiutkin Nov 30 '18 at 13:58


y = 9, x = -54, x + y = -45. Not much else I can say...


Is it:

-549, because you wrote the code in JavaScript?


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