1.

Use each of the following figures only once and form three groups. The three groups so formed are:

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


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