PSLE
Sarah and Sabrina folded paper balls over two days. On Tuesday, Sarah folded 10 paper balls more than Sabrina. On Wednesday, Sarah folded another 40 paper balls and Sabrina folded another 26. At the end of the two days, Sarah made ⁵₈ of the total number of balls. What was the number of paper balls that Sabrina folded?

	Sarah	Sabrina	Difference
Before	1 u + 10	1 u	10
Change	+ 40	+ 26
After	1 u + 50	1 u + 26	24
Comparing between Sarah and Sabrina in the end	5 p	3 p	2 p

Difference between the number of paper balls that Sarah and Sabrina folded in the end is repeated.

Difference between the number of paper balls that Sarah and Sabrina folded in the end
= 5 p - 3 p
= 2 p

Difference between the number of paper balls that Sarah and Sabrina folded in the end
= (1 u + 50) - (1 u + 26)
= 1 u + 50 - 1 u - 26
= 50 - 26
= 24

2 p = 24

1 p = 24 ÷ 2 = 12

Number of paper balls that Sabrina folded
= 3 p
= 3 x 12
= 36

Answer(s): 36