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Math/Logic question I can't find the correct answer anywhere

1+4=5
2+5=12
3+6=21
8+11=
 
I have seen 3 examples of answers people say are correct 
 
Example 1 answer 96
 
1×4=4+1=5
2×5=10+2=12
3×6=18+3=21
8×11=88+8=96
 
Example 2 answer 40
 
1+4=5
5+2+5=12
12+3+6=21
21+8+11=40
 
Example 3 answer 19
 
4+1=5 TRUE 
2+5=12 FALSE 
3+6=21 FALSE 
8+11=19
 
I have no idea what is the correct answer. And it is causing quite a stir on my Facebook wall. 

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David W. | Experienced ProfExperienced Prof
4.4 4.4 (39 lesson ratings) (39)
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Check Marked as Best Answer
Fill in the missing equations in the sequence of equations and the final sum:
   1+4=5
   2+5=12
   3+6=21
   . . .
   8+11= ...
 
Answer:
   1+4=5                [5]
   2+5=12              [+7]
   3+6=21              [+9]
   4+7=32              [+11]
   5+8=45              [+13]
   6+9=60              [+15]
   7+10=77            [+17]
   8+11=96            [+19]

Comments

Neatly done!
Mark of Carson