Adam has stickers in 4 colours.
34 of the stickers are red.
The rest of the stickers are yellow, blue and green in the ratio of 1 : 3 : 3.
If there are 90 more blue stickers than yellow stickers,
how many red stickers are there?
Red |
Yellow |
Blue |
Green |
3 x 7 |
1 x 7 |
|
1 x 1 |
3 x 1 |
3 x 1 |
21 u |
1 u |
3 u |
3 u |
The number of red, yellow and blue stickers is the combined repeated identity.
Make the number of red, yellow and blue stickers the same using the LCM of 1 and 7.
LCM of 1 and 7 = 7
Number of more blue stickers than yellow stickers
= 3 u - 1 u
= 2 u
2 u = 90
1 u = 90 ÷ 2 = 45
Number of red stickers
= 21 u
= 21 x 45
= 945
Answer(s): 945