Question:
There were 40 more girls than boys in the school hall. 2/5 of the girls and 1/3 of the boys left the hall. In the end, there were 18 more girls than boys remaining in the hall. Find the total number of girls and boys in the hall at first.
Submitted by reader.
Solution:
![P6 / Nanyang / 2020 / SA2 Prelims / Paper 2 – Q17 [5 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/11/P6_Nanyang_2020_SA2_Paper2_Q17-Qns.jpg?resize=400%2C260&ssl=1)
Solution 2 is brilliant!