1.

How many numbers are there which are preceded by and followed by 5 in this series?                        5 2 4 3 2 1 6 5 3 2 1 5 2 4 5 6 8 9        

A.  1                            
B.                         2            
C.                         4                            
D.                         5          
Answer» B.                         2            


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