PSLE
Tiffany and Xandra folded paper stars over two days. On Saturday, Tiffany folded 45 paper stars more than Xandra. On Sunday, Tiffany folded another 26 paper stars and Xandra folded another 1. At the end of the two days, Tiffany made ⁷₉ of the total number of stars. What was the number of paper stars that Xandra folded?

	Tiffany	Xandra	Difference
Before	1 u + 45	1 u	45
Change	+ 26	+ 1
After	1 u + 71	1 u + 1	70
Comparing between Tiffany and Xandra in the end	7 p	2 p	5 p

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

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

Difference between the number of paper stars that Tiffany and Xandra folded in the end
= (1 u + 71) - (1 u + 1)
= 1 u + 71 - 1 u - 1
= 71 - 1
= 70

5 p = 70

1 p = 70 ÷ 5 = 14

Number of paper stars that Xandra folded
= 2 p
= 2 x 14
= 28

Answer(s): 28