PSLE
Abi and Julie folded paper cranes over two days. On Saturday, Abi folded 13 paper cranes more than Julie. On Sunday, Abi folded another 34 paper cranes and Julie folded another 7. At the end of the two days, Abi made ⁷₁₀ of the total number of cranes. What was the number of paper cranes that Julie folded?

	Abi	Julie	Difference
Before	1 u + 13	1 u	13
Change	+ 34	+ 7
After	1 u + 47	1 u + 7	40
Comparing between Abi and Julie in the end	7 p	3 p	4 p

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

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

Difference between the number of paper cranes that Abi and Julie folded in the end
= (1 u + 47) - (1 u + 7)
= 1 u + 47 - 1 u - 7
= 47 - 7
= 40

4 p = 40

1 p = 40 ÷ 4 = 10

Number of paper cranes that Julie folded
= 3 p
= 3 x 10
= 30

Answer(s): 30