Adam has stickers in 4 colours.
49 of the stickers are blue.
The rest of the stickers are green, yellow and red in the ratio of 3 : 5 : 7.
If there are 30 more yellow stickers than green stickers,
how many blue stickers are there?
Blue |
Green |
Yellow |
Red |
4 x 3 |
5 x 3 |
|
3 x 1 |
5 x 1 |
7 x 1 |
12 u |
3 u |
5 u |
7 u |
The number of blue, green and yellow stickers is the combined repeated identity.
Make the number of blue, green and yellow stickers the same using the LCM of 5 and 15.
LCM of 5 and 15 = 15
Number of more yellow stickers than green stickers
= 5 u - 3 u
= 2 u
2 u = 30
1 u = 30 ÷ 2 = 15
Number of blue stickers
= 12 u
= 12 x 15
= 180
Answer(s): 180