Adam has stickers in 4 colours.
35 of the stickers are green.
The rest of the stickers are red, yellow and blue in the ratio of 2 : 5 : 7.
If there are 120 more yellow stickers than red stickers,
how many green stickers are there?
Green |
Red |
Yellow |
Blue |
3 x 7 |
2 x 7 |
|
2 x 1 |
5 x 1 |
7 x 1 |
21 u |
2 u |
5 u |
7 u |
The number of green, red and yellow stickers is the combined repeated identity.
Make the number of green, red and yellow stickers the same using the LCM of 2 and 14.
LCM of 2 and 14 = 14
Number of more yellow stickers than red stickers
= 5 u - 2 u
= 3 u
3 u = 120
1 u = 120 ÷ 3 = 40
Number of green stickers
= 21 u
= 21 x 40
= 840
Answer(s): 840