Question:
The figure below is formed using 3 squares of different sizes. The area of the figure is 285 cm². The area of the shaded square is 64 cm². The length of the straight line AB is 27 cm. The length of each square is a whole number when measured in cm. Find the length of the smallest square.
Solution:
![P6 / Nanyang / 2019 / CA1 / Paper 2 – Q15 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/04/P6_CA1_2019_Nanyang_Paper2_Q15-Qns.jpg?resize=400%2C260&ssl=1)