PSLE
A stallholder had an equal number of passion fruits, grapefruits and pomegranates at first. After 40 pomegranates, some passion fruits and grapefruits were sold, there were 149 fruits left. There were 2 times as many passion fruits as grapefruits left. The number of pomegranates left was 36 less than the number of passion fruits left. How many grapefruits were sold?

	Passion Fruits	Grapefruits	Pomegranates	Total
Before	1	1	1
Change	- ?	- ?	- 40
After	2 u	1 u	2 u - 36	149

Total number of fruits in the end
= 2 u + 1 u + 2 u - 36
= 5 u - 36

5 u - 36 = 149
5 u = 149 + 36
5 u = 185

1 u = 185 ÷ 5 = 37

Number of pomegranates at first
= 2 u - 36 + 40 
= 2 x 37 + 4 
= 78 

The number of pomegranates and grapefruits at first is the same.

Number of grapefruits sold
= 78 - 37
= 41

Answer(s): 41