PSLE
Betty had two ribbons of the same length. She cut the first ribbon into equal parts of length 50 cm and to each part she tied 2 silver cartoon cutouts. After that, she cut the second ribbon into equal parts of length 60 cm and to each part she tied 5 red cartoon cutouts. When she finished tying, she counted that there were 52 more red cartoon cutouts than silver cartoon cutouts. How many cartoon cutouts were there altogether?

	First ribbon	Second ribbon	Difference	Total
Length of each part	50 cm	60 cm
Number of balloons tied to each part	2 silver balloons	5 red balloons
LCM	300 cm	300 cm
Number of equal parts	300 ÷ 50 = 6	300 ÷ 60 = 5
Number of balloons for each ribbon per set	6 x 2 = 12	5 x 5 = 25	25 - 12 = 13	12 + 25 = 37

LCM of 50 and 60 = 300

Number of sets of 2 silver cartoon cutouts in a length of 300 cm
= 300 ÷ 50
= 6

Number of silver cartoon cutouts in a length of 300 cm
= 6 x 2
= 12

Number of sets of 5 red cartoon cutouts in a length of 300 cm
= 300 ÷ 60
= 5

Number of red cartoon cutouts in a length of 300 cm
= 5 x 5
= 25

Extra number of red cartoon cutouts in a length of 300 cm
= 25 - 12
= 13

Number of sets of cartoon cutouts
= 52 ÷ 13
= 4

Total number of cartoon cutouts in one set of 300 cm of silver balloons and one set of 300 cm of red balloons
= 12 + 25
= 37

Total number of cartoon cutouts of the two ribbons
= 4 x 37
= 148

Answer(s): 148