Adam has stickers in 4 colours.
49 of the stickers are red.
The rest of the stickers are yellow, blue and green in the ratio of 2 : 4 : 7.
If there are 40 more blue stickers than yellow stickers,
how many red stickers are there?
Red |
Yellow |
Blue |
Green |
4 x 13 |
5 x 13 |
|
2 x 5 |
4 x 5 |
7 x 5 |
52 u |
10 u |
20 u |
35 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 5 and 13.
LCM of 5 and 13 = 65
Number of more blue stickers than yellow stickers
= 20 u - 10 u
= 10 u
10 u = 40
1 u = 40 ÷ 10 = 4
Number of red stickers
= 52 u
= 52 x 4
= 208
Answer(s): 208