PSLE
Min and Nicole folded paper cranes over two days. On Monday, Min folded 4 paper cranes more than Nicole. On Tuesday, Min folded another 24 paper cranes and Nicole folded another 1. At the end of the two days, Min made ⁵₇ of the total number of cranes. What was the number of paper cranes that Nicole folded?

	Min	Nicole	Difference
Before	1 u + 4	1 u	4
Change	+ 24	+ 1
After	1 u + 28	1 u + 1	27
Comparing between Min and Nicole in the end	5 p	2 p	3 p

Difference between the number of paper cranes that Min and Nicole folded in the end is repeated.

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

Difference between the number of paper cranes that Min and Nicole folded in the end
= (1 u + 28) - (1 u + 1)
= 1 u + 28 - 1 u - 1
= 28 - 1
= 27

3 p = 27

1 p = 27 ÷ 3 = 9

Number of paper cranes that Nicole folded
= 2 p
= 2 x 9
= 18

Answer(s): 18