Adam has stickers in 4 colours.
38 of the stickers are blue.
The rest of the stickers are yellow, red and green in the ratio of 1 : 3 : 9.
If there are 130 more red stickers than yellow stickers,
how many blue stickers are there?
Blue |
Yellow |
Red |
Green |
3 x 13 |
5 x 13 |
|
1 x 5 |
3 x 5 |
9 x 5 |
39 u |
5 u |
15 u |
45 u |
The number of blue, yellow and red stickers is the combined repeated identity.
Make the number of blue, yellow and red stickers the same using the LCM of 5 and 13.
LCM of 5 and 13 = 65
Number of more red stickers than yellow stickers
= 15 u - 5 u
= 10 u
10 u = 130
1 u = 130 ÷ 10 = 13
Number of blue stickers
= 39 u
= 39 x 13
= 507
Answer(s): 507