PSLE
Jaslyn and Sarah folded paper cranes over two days. On Saturday, Jaslyn folded 39 paper cranes more than Sarah. On Sunday, Jaslyn folded another 36 paper cranes and Sarah folded another 19. At the end of the two days, Jaslyn made ⁷₁₀ of the total number of cranes. What was the number of paper cranes that Sarah folded?

	Jaslyn	Sarah	Difference
Before	1 u + 39	1 u	39
Change	+ 36	+ 19
After	1 u + 75	1 u + 19	56
Comparing between Jaslyn and Sarah in the end	7 p	3 p	4 p

Difference between the number of paper cranes that Jaslyn and Sarah folded in the end is repeated.

Difference between the number of paper cranes that Jaslyn and Sarah folded in the end
= 7 p - 3 p
= 4 p

Difference between the number of paper cranes that Jaslyn and Sarah folded in the end
= (1 u + 75) - (1 u + 19)
= 1 u + 75 - 1 u - 19
= 75 - 19
= 56

4 p = 56

1 p = 56 ÷ 4 = 14

Number of paper cranes that Sarah folded
= 3 p
= 3 x 14
= 42

Answer(s): 42