1.

If \[''x''\] stands for \[''+''\]; \[''y''\]stands for \[''-''\]; \[''z''\] stands for \[''\div ''\] and \[''w''\]stands for \[''\times ''\], then 10w 2x 5y 5 = ?

A. 15                    
B.        12        
C. 20     
D.        10
E. None of these
Answer» D.        10


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