1.

Direction: In each of the following questions, group the given figures into three classes on the basis of their common properties using each figure only once.

A.  1,6, 7; 2, 4, 8; 3, 5, 9 
B.  1, 5, 7; 2, 4, 6; 3, 8, 9
C.   
D.  1, 7, 9; 3, 5, 8; 2, 4, 6
Answer» B.  1, 5, 7; 2, 4, 6; 3, 8, 9


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