Question:
A pack of trading cards contained 7 normal cards and 2 special cards. Weihua and John each bought a box of 40 packs of card. After opening their cards, they decided to trade with each other for the cards they wanted. 3 normal cards were traded for each special card. After trading, Weihua was left with a total 384 cards.
(a) How many cards did John have in the end?
(b) How many special cards did Weihua have in the end?
Solution:
![P6 / Maris Stella / 2019 / SA2 / Paper 2 – Q07 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/06/P6_Maris_Stella_2019_Prelims_Paper2_Q07-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / River Valley / 2019 / SA2 / Paper 2 – Q17 [5 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/07/P6_River_Valley_2019_Prelims_Paper2_Q17-Qns.jpg?resize=400%2C260&ssl=1)