PSLE
Esther and Abi folded paper cranes over two days. On Friday, Esther folded 60 paper cranes more than Abi. On Saturday, Esther folded another 28 paper cranes and Abi folded another 32. At the end of the two days, Esther made ⁷₁₀ of the total number of cranes. What was the number of paper cranes that Abi folded?

	Esther	Abi	Difference
Before	1 u + 60	1 u	60
Change	+ 28	+ 32
After	1 u + 88	1 u + 32	56
Comparing between Esther and Abi in the end	7 p	3 p	4 p

Difference between the number of paper cranes that Esther and Abi folded in the end is repeated.

Difference between the number of paper cranes that Esther and Abi folded in the end
= 7 p - 3 p
= 4 p

Difference between the number of paper cranes that Esther and Abi folded in the end
= (1 u + 88) - (1 u + 32)
= 1 u + 88 - 1 u - 32
= 88 - 32
= 56

4 p = 56

1 p = 56 ÷ 4 = 14

Number of paper cranes that Abi folded
= 3 p
= 3 x 14
= 42

Answer(s): 42