= 24  
= ?  
= ?  
= 29  
= 28  = 20  = ?  = ? 
Each traffic sign stands for a number. Some of the sums of rows or columns are shown. What numbers might the signs stand for?
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Topics: Starter  Algebra  Logic  Problem Solving  Puzzles  Simultaneous Equations
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= 5  = 6  
= 7  = 10 
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The answer to this puzzle is not 12. What is it?