# MATH PUZZLE ABOUT SEQUENCE [closed]

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

• This seems extremely simple and not really a puzzle... – gabbo1092 Nov 30 '18 at 13:55
• Too simple for a puzzle, took me about 20 sec to calculate the answer – Eugene Anisiutkin Nov 30 '18 at 13:58