PSLE
Nora and Linda folded paper balls over two days. On Saturday, Nora folded 3 paper balls more than Linda. On Sunday, Nora folded another 39 paper balls and Linda folded another 14. At the end of the two days, Nora made ⁵₈ of the total number of balls. What was the number of paper balls that Linda folded?

	Nora	Linda	Difference
Before	1 u + 3	1 u	3
Change	+ 39	+ 14
After	1 u + 42	1 u + 14	28
Comparing between Nora and Linda in the end	5 p	3 p	2 p

Difference between the number of paper balls that Nora and Linda folded in the end is repeated.

Difference between the number of paper balls that Nora and Linda folded in the end
= 5 p - 3 p
= 2 p

Difference between the number of paper balls that Nora and Linda folded in the end
= (1 u + 42) - (1 u + 14)
= 1 u + 42 - 1 u - 14
= 42 - 14
= 28

2 p = 28

1 p = 28 ÷ 2 = 14

Number of paper balls that Linda folded
= 3 p
= 3 x 14
= 42

Answer(s): 42