Question:
For a scrapbook-making course, each participant was given some buttons. Each adult received 10 buttons. Each girl received 5 buttons and each boy recevied 4 buttons. The ratio of the number of girls to the number of boys was 7 : 4. Half of the total number of participants was adults. The participants received a total of 3381 buttons. How many participants were there at the course?
Solution:
![P6 / Maris Stella / 2020 / SA2 Prelims / Paper 1 – Q25 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/12/P6_SA2_2020_Maris_Stella_Paper1_Q25-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / SCGS / 2020 / SA2 Prelims / Paper 2 – Q16 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/12/P6_SCGS_2020_SA2_Paper2_Q16-Qns.jpg?resize=400%2C260&ssl=1)