Adam has stickers in 4 colours.
35 of the stickers are red.
The rest of the stickers are yellow, green and blue in the ratio of 1 : 3 : 9.
If there are 80 more green stickers than yellow stickers,
how many red stickers are there?
Red |
Yellow |
Green |
Blue |
3 x 13 |
2 x 13 |
|
1 x 2 |
3 x 2 |
9 x 2 |
39 u |
2 u |
6 u |
18 u |
The number of red, yellow and green stickers is the combined repeated identity.
Make the number of red, yellow and green stickers the same using the LCM of 2 and 13.
LCM of 2 and 13 = 26
Number of more green stickers than yellow stickers
= 6 u - 2 u
= 4 u
4 u = 80
1 u = 80 ÷ 4 = 20
Number of red stickers
= 39 u
= 39 x 20
= 780
Answer(s): 780