PSLE
Marion and Xylia folded paper cranes over two days. On Thursday, Marion folded 12 paper cranes more than Xylia. On Friday, Marion folded another 27 paper cranes and Xylia folded another 6. At the end of the two days, Marion made ⁵₇ of the total number of cranes. What was the number of paper cranes that Marion folded?

	Marion	Xylia	Difference
Before	1 u + 12	1 u	12
Change	+ 27	+ 6
After	1 u + 39	1 u + 6	33
Comparing between Marion and Xylia in the end	5 p	2 p	3 p

Difference between the number of paper cranes that Marion and Xylia folded in the end is repeated.

Difference between the number of paper cranes that Marion and Xylia folded in the end
= 5 p - 2 p
= 3 p

Difference between the number of paper cranes that Marion and Xylia folded in the end
= (1 u + 39) - (1 u + 6)
= 1 u + 39 - 1 u - 6
= 39 - 6
= 33

3 p = 33

1 p = 33 ÷ 3 = 11

Number of paper cranes that Marion folded
= 5 p
= 5 x 11
= 55

Answer(s): 55