PSLE
Xandra and Zoe folded paper cranes over two days. On Monday, Xandra folded 30 paper cranes more than Zoe. On Tuesday, Xandra folded another 20 paper cranes and Zoe folded another 24. At the end of the two days, Xandra made ⁵₈ of the total number of cranes. What was the number of paper cranes that Zoe folded?

	Xandra	Zoe	Difference
Before	1 u + 30	1 u	30
Change	+ 20	+ 24
After	1 u + 50	1 u + 24	26
Comparing between Xandra and Zoe in the end	5 p	3 p	2 p

Difference between the number of paper cranes that Xandra and Zoe folded in the end is repeated.

Difference between the number of paper cranes that Xandra and Zoe folded in the end
= 5 p - 3 p
= 2 p

Difference between the number of paper cranes that Xandra and Zoe folded in the end
= (1 u + 50) - (1 u + 24)
= 1 u + 50 - 1 u - 24
= 50 - 24
= 26

2 p = 26

1 p = 26 ÷ 2 = 13

Number of paper cranes that Zoe folded
= 3 p
= 3 x 13
= 39

Answer(s): 39