PSLE
Jane and Mary folded paper stars over two days. On Saturday, Jane folded 29 paper stars more than Mary. On Sunday, Jane folded another 24 paper stars and Mary folded another 14. At the end of the two days, Jane made ⁵₇ of the total number of stars. What was the number of paper stars that Mary folded?

	Jane	Mary	Difference
Before	1 u + 29	1 u	29
Change	+ 24	+ 14
After	1 u + 53	1 u + 14	39
Comparing between Jane and Mary in the end	5 p	2 p	3 p

Difference between the number of paper stars that Jane and Mary folded in the end is repeated.

Difference between the number of paper stars that Jane and Mary folded in the end
= 5 p - 2 p
= 3 p

Difference between the number of paper stars that Jane and Mary folded in the end
= (1 u + 53) - (1 u + 14)
= 1 u + 53 - 1 u - 14
= 53 - 14
= 39

3 p = 39

1 p = 39 ÷ 3 = 13

Number of paper stars that Mary folded
= 2 p
= 2 x 13
= 26

Answer(s): 26