Question:
Zoe baked some chocolate cookies and gave half of them to Mabel. Mabel baked some butter cookies and gave half of them to Zoe. Zoe ate 5 butter cookies and the ratio of the number of chocolate cookies to the number of butter cookies she had left became 4 : 1. Mabel ate 3 chocolate cookies and the ratio of the number of chocolate cookies she had left to the number of butter cookies became 3 : 1.
(a) Were there more chocolate cookies or butter cookies at first?
(b) How many chocolate cookies did Zoe bake?
Solution:
![P6 / Rosyth / 2020 / SA2 Prelims / Paper 2 – Q13 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/11/P6_Rosyth_2020_SA2_Paper2_Q13-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Tao Nan / 2019 / SA1 / Paper 2 – Q04 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_Tao_Nan_2019_SA1_Paper2_Q04-Qns.jpg?resize=400%2C184&ssl=1)