PSLE
Penelope and Xandra folded paper stars over two days. On Saturday, Penelope folded 40 paper stars more than Xandra. On Sunday, Penelope folded another 23 paper stars and Xandra folded another 19. At the end of the two days, Penelope made ⁷₁₀ of the total number of stars. What was the number of paper stars that Penelope folded?

	Penelope	Xandra	Difference
Before	1 u + 40	1 u	40
Change	+ 23	+ 19
After	1 u + 63	1 u + 19	44
Comparing between Penelope and Xandra in the end	7 p	3 p	4 p

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

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

Difference between the number of paper stars that Penelope and Xandra folded in the end
= (1 u + 63) - (1 u + 19)
= 1 u + 63 - 1 u - 19
= 63 - 19
= 44

4 p = 44

1 p = 44 ÷ 4 = 11

Number of paper stars that Penelope folded
= 7 p
= 7 x 11
= 77

Answer(s): 77