Maths Puzzle 43

FIND THE MISSING NUMBER IN THE BELOW MATH PUZZLE

puzzles9 - puzzle 43 - find missing number in math puzzle.

                                                               
Answer  :   12 

Solution   :   

                     In each box, sum of numbers in first column divided by sum of numbers in third column gives middle number in second column.

(5+11)     ÷   (4+4)   =  2 ;

(7+13)     ÷   (1+3)   =  5 ;

(20+12)   ÷   (4+4)   =  4 ;

So, answer is 12.

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