PSLE
Rachel and Xuan folded paper stars over two days. On Wednesday, Rachel folded 28 paper stars more than Xuan. On Thursday, Rachel folded another 25 paper stars and Xuan folded another 3. At the end of the two days, Rachel made ⁷₉ of the total number of stars. What was the number of paper stars that Rachel folded?

	Rachel	Xuan	Difference
Before	1 u + 28	1 u	28
Change	+ 25	+ 3
After	1 u + 53	1 u + 3	50
Comparing between Rachel and Xuan in the end	7 p	2 p	5 p

Difference between the number of paper stars that Rachel and Xuan folded in the end is repeated.

Difference between the number of paper stars that Rachel and Xuan folded in the end
= 7 p - 2 p
= 5 p

Difference between the number of paper stars that Rachel and Xuan folded in the end
= (1 u + 53) - (1 u + 3)
= 1 u + 53 - 1 u - 3
= 53 - 3
= 50

5 p = 50

1 p = 50 ÷ 5 = 10

Number of paper stars that Rachel folded
= 7 p
= 7 x 10
= 70

Answer(s): 70