PSLE
Zara and Vanessa folded paper balls over two days. On Saturday, Zara folded 41 paper balls more than Vanessa. On Sunday, Zara folded another 21 paper balls and Vanessa folded another 18. At the end of the two days, Zara made ⁷₁₀ of the total number of balls. What was the number of paper balls that Zara folded?

	Zara	Vanessa	Difference
Before	1 u + 41	1 u	41
Change	+ 21	+ 18
After	1 u + 62	1 u + 18	44
Comparing between Zara and Vanessa in the end	7 p	3 p	4 p

Difference between the number of paper balls that Zara and Vanessa folded in the end is repeated.

Difference between the number of paper balls that Zara and Vanessa folded in the end
= 7 p - 3 p
= 4 p

Difference between the number of paper balls that Zara and Vanessa folded in the end
= (1 u + 62) - (1 u + 18)
= 1 u + 62 - 1 u - 18
= 62 - 18
= 44

4 p = 44

1 p = 44 ÷ 4 = 11

Number of paper balls that Zara folded
= 7 p
= 7 x 11
= 77

Answer(s): 77