1.

                        The smallest fraction, which divides each of\[\frac{6}{7},\frac{5}{14}\] and \[\frac{10}{21}\] exactly.

A.  \[4\frac{2}{7}\]         
B.    \[\frac{3}{14}\]         
C.    \[\frac{2}{21}\]        
D.    \[\frac{5}{28}\]                     
Answer» B.    \[\frac{3}{14}\]         


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