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Source: — Data Sufficiency |

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by Anurag@Gurome » Tue Dec 13, 2011 12:31 am
karthikpandian19 wrote:Is quadrilateral Q a square?

(1) The sides of Q have the same length.
(2) The diagonals of Q have the same length.
1] The sides of Q have the same length implies that the quadrilateral could be a square or a rhombus; NOT sufficient.

2] The diagonals of Q have the same length implies that square and rectangle have diagonals of same length, which is alone NOT sufficient.

Combining (1) and (2), only a square is a quadrilateral, which has all the sides of same length and two the diagonals of same length; SUFFICIENT.

The correct answer is C.
Anurag Mairal, Ph.D., MBA
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