Adam has stickers in 4 colours.
27 of the stickers are blue.
The rest of the stickers are green, yellow and red in the ratio of 2 : 5 : 5.
If there are 30 more yellow stickers than green stickers,
how many blue stickers are there?
Blue |
Green |
Yellow |
Red |
2 x 12 |
5 x 12 |
|
2 x 5 |
5 x 5 |
5 x 5 |
24 u |
10 u |
25 u |
25 u |
The number of blue, green and yellow stickers is the combined repeated identity.
Make the number of blue, green and yellow stickers the same using the LCM of 5 and 12.
LCM of 5 and 12 = 60
Number of more yellow stickers than green stickers
= 25 u - 10 u
= 15 u
15 u = 30
1 u = 30 ÷ 15 = 2
Number of blue stickers
= 24 u
= 24 x 2
= 48
Answer(s): 48