PSLE
Nicole had two ribbons of the same length. She cut the first ribbon into equal parts of length 30 cm and to each part she tied 2 blue cartoon cutouts. After that, she cut the second ribbon into equal parts of length 50 cm and to each part she tied 4 green cartoon cutouts. When she finished tying, she counted that there were 4 more green cartoon cutouts than blue cartoon cutouts. How many cartoon cutouts were there altogether?

	First ribbon	Second ribbon	Difference	Total
Length of each part	30 cm	50 cm
Number of balloons tied to each part	2 blue balloons	4 green balloons
LCM	150 cm	150 cm
Number of equal parts	150 ÷ 30 = 5	150 ÷ 50 = 3
Number of balloons for each ribbon per set	5 x 2 = 10	4 x 3 = 12	12 - 10 = 2	10 + 12 = 22

LCM of 30 and 50 = 150

Number of sets of 2 blue cartoon cutouts in a length of 150 cm
= 150 ÷ 30
= 5

Number of blue cartoon cutouts in a length of 150 cm
= 5 x 2
= 10

Number of sets of 4 green cartoon cutouts in a length of 150 cm
= 150 ÷ 50
= 3

Number of green cartoon cutouts in a length of 150 cm
= 3 x 4
= 12

Extra number of green cartoon cutouts in a length of 150 cm
= 12 - 10
= 2

Number of sets of cartoon cutouts
= 4 ÷ 2
= 2

Total number of cartoon cutouts in one set of 150 cm of blue balloons and one set of 150 cm of green balloons
= 10 + 12
= 22

Total number of cartoon cutouts of the two ribbons
= 2 x 22
= 44

Answer(s): 44