PSLE
Roshel and Penelope folded paper cranes over two days. On Wednesday, Roshel folded 64 paper cranes more than Penelope. On Thursday, Roshel folded another 25 paper cranes and Penelope folded another 14. At the end of the two days, Roshel made ⁷₉ of the total number of cranes. What was the number of paper cranes that Penelope folded?

	Roshel	Penelope	Difference
Before	1 u + 64	1 u	64
Change	+ 25	+ 14
After	1 u + 89	1 u + 14	75
Comparing between Roshel and Penelope in the end	7 p	2 p	5 p

Difference between the number of paper cranes that Roshel and Penelope folded in the end is repeated.

Difference between the number of paper cranes that Roshel and Penelope folded in the end
= 7 p - 2 p
= 5 p

Difference between the number of paper cranes that Roshel and Penelope folded in the end
= (1 u + 89) - (1 u + 14)
= 1 u + 89 - 1 u - 14
= 89 - 14
= 75

5 p = 75

1 p = 75 ÷ 5 = 15

Number of paper cranes that Penelope folded
= 2 p
= 2 x 15
= 30

Answer(s): 30