PSLE
Winnie had two streamers of the same length. She cut the first streamer into equal parts of length 20 cm and to each part she tied 2 gold paper cranes. After that, she cut the second streamer into equal parts of length 25 cm and to each part she tied 4 white paper cranes. When she finished tying, she counted that there were 24 more white paper cranes than gold paper cranes. How many paper cranes were there altogether?

	First streamer	Second streamer	Difference	Total
Length of each part	20 cm	25 cm
Number of balloons tied to each part	2 gold balloons	4 white balloons
LCM	100 cm	100 cm
Number of equal parts	100 ÷ 20 = 5	100 ÷ 25 = 4
Number of balloons for each streamer per set	5 x 2 = 10	4 x 4 = 16	16 - 10 = 6	10 + 16 = 26

LCM of 20 and 25 = 100

Number of sets of 2 gold paper cranes in a length of 100 cm
= 100 ÷ 20
= 5

Number of gold paper cranes in a length of 100 cm
= 5 x 2
= 10

Number of sets of 4 white paper cranes in a length of 100 cm
= 100 ÷ 25
= 4

Number of white paper cranes in a length of 100 cm
= 4 x 4
= 16

Extra number of white paper cranes in a length of 100 cm
= 16 - 10
= 6

Number of sets of paper cranes
= 24 ÷ 6
= 4

Total number of paper cranes in one set of 100 cm of gold balloons and one set of 100 cm of white balloons
= 10 + 16
= 26

Total number of paper cranes of the two streamers
= 4 x 26
= 104

Answer(s): 104