Adam has stickers in 4 colours.
37 of the stickers are red.
The rest of the stickers are yellow, blue and green in the ratio of 2 : 5 : 7.
If there are 90 more blue stickers than yellow stickers,
how many red stickers are there?
Red |
Yellow |
Blue |
Green |
3 x 7 |
4 x 7 |
|
2 x 2 |
5 x 2 |
7 x 2 |
21 u |
4 u |
10 u |
14 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 4 and 14.
LCM of 4 and 14 = 28
Number of more blue stickers than yellow stickers
= 10 u - 4 u
= 6 u
6 u = 90
1 u = 90 ÷ 6 = 15
Number of red stickers
= 21 u
= 21 x 15
= 315
Answer(s): 315