Question:
The number of blue pens that Mrs Li had was 6/5 of the number of red pens. Her son took 52 red pens and 24 blue pens from her. After that, the number of red pens became 1/6 of the number of blue pens. How many blue pens did Mrs Li have in the end?
Solution:
![P6 / Henry Park / 2020 / SA2 Prelims / Paper 1 – Q24 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/08/P6_SA2_2020_Henry_Park_Paper1_Q24-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Catholic High / 2018 / SA1 / Paper 1 – Q26 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/05/P6_SA1_2018_Catholic_High_Paper1_Q26-Qns.jpg?resize=400%2C222&ssl=1)