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 / Nanyang / 2019 / CA1 / Paper 1 – Q28 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/04/P6_CA1_2019_Nanyang_Paper1_Q28-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Ai Tong / 2020 / SA2 Prelims / Paper 1 – Q24 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/08/P6_SA2_2020_Ai_Tong_Paper1_Q24-Qns.jpg?resize=400%2C260&ssl=1)