PSLE
Pamela and Nora folded paper cranes over two days. On Friday, Pamela folded 31 paper cranes more than Nora. On Saturday, Pamela folded another 13 paper cranes and Nora folded another 8. At the end of the two days, Pamela made ⁵₇ of the total number of cranes. What was the number of paper cranes that Pamela folded?

	Pamela	Nora	Difference
Before	1 u + 31	1 u	31
Change	+ 13	+ 8
After	1 u + 44	1 u + 8	36
Comparing between Pamela and Nora in the end	5 p	2 p	3 p

Difference between the number of paper cranes that Pamela and Nora folded in the end is repeated.

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

Difference between the number of paper cranes that Pamela and Nora folded in the end
= (1 u + 44) - (1 u + 8)
= 1 u + 44 - 1 u - 8
= 44 - 8
= 36

3 p = 36

1 p = 36 ÷ 3 = 12

Number of paper cranes that Pamela folded
= 5 p
= 5 x 12
= 60

Answer(s): 60