Adam has stickers in 4 colours.
67 of the stickers are red.
The rest of the stickers are blue, yellow and green in the ratio of 2 : 4 : 7.
If there are 30 more yellow stickers than blue stickers,
how many red stickers are there?
Red |
Blue |
Yellow |
Green |
6 x 13 |
1 x 13 |
|
2 x 1 |
4 x 1 |
7 x 1 |
78 u |
2 u |
4 u |
7 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 1 and 13.
LCM of 1 and 13 = 13
Number of more yellow stickers than blue stickers
= 4 u - 2 u
= 2 u
2 u = 30
1 u = 30 ÷ 2 = 15
Number of red stickers
= 78 u
= 78 x 15
= 1170
Answer(s): 1170