Adam has stickers in 4 colours.
79 of the stickers are blue.
The rest of the stickers are green, red and yellow in the ratio of 1 : 4 : 9.
If there are 30 more red stickers than green stickers,
how many blue stickers are there?
Blue |
Green |
Red |
Yellow |
7 x 7 |
2 x 7 |
|
1 x 1 |
4 x 1 |
9 x 1 |
49 u |
1 u |
4 u |
9 u |
The number of blue, green and red stickers is the combined repeated identity.
Make the number of blue, green and red stickers the same using the LCM of 2 and 14.
LCM of 2 and 14 = 14
Number of more red stickers than green stickers
= 4 u - 1 u
= 3 u
3 u = 30
1 u = 30 ÷ 3 = 10
Number of blue stickers
= 49 u
= 49 x 10
= 490
Answer(s): 490