WBCS 2024 · Question 192 of 196

“Having four equal sides is a necessary condition for a quadrilateral to be a square, but it is not sufficient.” This means:

Reasoning

AA quadrilateral cannot be square unless it has four equal sides, but having four equal sides doesn’t guarantee a quadrilateral to be a square.Correct
BNo quadrilateral with four equal sides is a square.
CFor a quadrilateral to be a square, all four sides cannot be equal.
DIn Mathematics, equality of sides is unrelated to the condition for a quadrilateral to be a square.

Answer: A. A quadrilateral cannot be square unless it has four equal sides, but having four equal sides doesn’t guarantee a quadrilateral to be a square.

Explanation

Official WBPSC key (Series A): (A) A quadrilateral cannot be square unless it has four equal sides, but having four equal sides doesn’t guarantee a quadrilateral to be a square. Four equal sides are necessary for a square but not sufficient — a rhombus has four equal sides without right angles.

Source: WBCS (Exe) etc. (Prelim) 2024, Series A

Practice the full WBCS 2024 paper

Timed test with all 196 questions, just like the real exam.

Start test