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AMO 2027 Grades 8-9 SET 2 - Self-study Question 9

AMO · AMO 2027 Grades 8-9 SET 2 - Self-study

Question 9

Albert, Bernard, Cindy and David look at a quadrilateral and say:
- Albert: It is a parallelogram.
- Bernard: It is a trapezoid.
- Cindy: It is a square.
- David: It is a rhombus.

Only one of the statements given by them is incorrect. Who gives incorrect statement?