PSLE
Penelope and Lucy folded paper stars over two days. On Monday, Penelope folded 26 paper stars more than Lucy. On Tuesday, Penelope folded another 29 paper stars and Lucy folded another 15. At the end of the two days, Penelope made ⁷₁₀ of the total number of stars. What was the number of paper stars that Lucy folded?

	Penelope	Lucy	Difference
Before	1 u + 26	1 u	26
Change	+ 29	+ 15
After	1 u + 55	1 u + 15	40
Comparing between Penelope and Lucy in the end	7 p	3 p	4 p

Difference between the number of paper stars that Penelope and Lucy folded in the end is repeated.

Difference between the number of paper stars that Penelope and Lucy folded in the end
= 7 p - 3 p
= 4 p

Difference between the number of paper stars that Penelope and Lucy folded in the end
= (1 u + 55) - (1 u + 15)
= 1 u + 55 - 1 u - 15
= 55 - 15
= 40

4 p = 40

1 p = 40 ÷ 4 = 10

Number of paper stars that Lucy folded
= 3 p
= 3 x 10
= 30

Answer(s): 30