Adam has stickers in 4 colours.
38 of the stickers are red.
The rest of the stickers are green, blue and yellow in the ratio of 3 : 4 : 5.
If there are 60 more blue stickers than green stickers,
how many red stickers are there?
Red |
Green |
Blue |
Yellow |
3 x 12 |
5 x 12 |
|
3 x 5 |
4 x 5 |
5 x 5 |
36 u |
15 u |
20 u |
25 u |
The number of red, green and blue stickers is the combined repeated identity.
Make the number of red, green and blue stickers the same using the LCM of 5 and 12.
LCM of 5 and 12 = 60
Number of more blue stickers than green stickers
= 20 u - 15 u
= 5 u
5 u = 60
1 u = 60 ÷ 5 = 12
Number of red stickers
= 36 u
= 36 x 12
= 432
Answer(s): 432