PSLE
Tiffany and Gabby folded paper stars over two days. On Tuesday, Tiffany folded 17 paper stars more than Gabby. On Wednesday, Tiffany folded another 33 paper stars and Gabby folded another 20. At the end of the two days, Tiffany made ⁵₈ of the total number of stars. What was the number of paper stars that Gabby folded?

	Tiffany	Gabby	Difference
Before	1 u + 17	1 u	17
Change	+ 33	+ 20
After	1 u + 50	1 u + 20	30
Comparing between Tiffany and Gabby in the end	5 p	3 p	2 p

Difference between the number of paper stars that Tiffany and Gabby folded in the end is repeated.

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

Difference between the number of paper stars that Tiffany and Gabby folded in the end
= (1 u + 50) - (1 u + 20)
= 1 u + 50 - 1 u - 20
= 50 - 20
= 30

2 p = 30

1 p = 30 ÷ 2 = 15

Number of paper stars that Gabby folded
= 3 p
= 3 x 15
= 45

Answer(s): 45