Adam has stickers in 4 colours.
47 of the stickers are green.
The rest of the stickers are yellow, red and blue in the ratio of 2 : 4 : 9.
If there are 20 more red stickers than yellow stickers,
how many green stickers are there?
Green |
Yellow |
Red |
Blue |
4 x 5 |
3 x 5 |
|
2 x 1 |
4 x 1 |
9 x 1 |
20 u |
2 u |
4 u |
9 u |
The number of green, yellow and red stickers is the combined repeated identity.
Make the number of green, yellow and red stickers the same using the LCM of 3 and 15.
LCM of 3 and 15 = 15
Number of more red stickers than yellow stickers
= 4 u - 2 u
= 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Number of green stickers
= 20 u
= 20 x 10
= 200
Answer(s): 200