Adam has stickers in 4 colours.
27 of the stickers are red.
The rest of the stickers are blue, yellow and green in the ratio of 2 : 3 : 7.
If there are 20 more yellow stickers than blue stickers,
how many red stickers are there?
Red |
Blue |
Yellow |
Green |
2 x 12 |
5 x 12 |
|
2 x 5 |
3 x 5 |
7 x 5 |
24 u |
10 u |
15 u |
35 u |
The number of red, blue and yellow stickers is the combined repeated identity.
Make the number of red, blue and yellow stickers the same using the LCM of 5 and 12.
LCM of 5 and 12 = 60
Number of more yellow stickers than blue stickers
= 15 u - 10 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of red stickers
= 24 u
= 24 x 4
= 96
Answer(s): 96