PSLE
Joelle and Eva folded paper stars over two days. On Friday, Joelle folded 20 paper stars more than Eva. On Saturday, Joelle folded another 36 paper stars and Eva folded another 16. At the end of the two days, Joelle made ⁷₁₀ of the total number of stars. What was the number of paper stars that Eva folded?

	Joelle	Eva	Difference
Before	1 u + 20	1 u	20
Change	+ 36	+ 16
After	1 u + 56	1 u + 16	40
Comparing between Joelle and Eva in the end	7 p	3 p	4 p

Difference between the number of paper stars that Joelle and Eva folded in the end is repeated.

Difference between the number of paper stars that Joelle and Eva folded in the end
= 7 p - 3 p
= 4 p

Difference between the number of paper stars that Joelle and Eva folded in the end
= (1 u + 56) - (1 u + 16)
= 1 u + 56 - 1 u - 16
= 56 - 16
= 40

4 p = 40

1 p = 40 ÷ 4 = 10

Number of paper stars that Eva folded
= 3 p
= 3 x 10
= 30

Answer(s): 30