PSLE
Julie and Gillian folded paper stars over two days. On Monday, Julie folded 3 paper stars more than Gillian. On Tuesday, Julie folded another 21 paper stars and Gillian folded another 4. At the end of the two days, Julie made ⁵₈ of the total number of stars. What was the number of paper stars that Gillian folded?

	Julie	Gillian	Difference
Before	1 u + 3	1 u	3
Change	+ 21	+ 4
After	1 u + 24	1 u + 4	20
Comparing between Julie and Gillian in the end	5 p	3 p	2 p

Difference between the number of paper stars that Julie and Gillian folded in the end is repeated.

Difference between the number of paper stars that Julie and Gillian folded in the end
= 5 p - 3 p
= 2 p

Difference between the number of paper stars that Julie and Gillian folded in the end
= (1 u + 24) - (1 u + 4)
= 1 u + 24 - 1 u - 4
= 24 - 4
= 20

2 p = 20

1 p = 20 ÷ 2 = 10

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

Answer(s): 30