Adam has 180 red stickers, blue stickers, yellow stickers and green stickers.
5% of the stickers are red.
15% of the stickers are blue.
The rest are yellow and green stickers.
There are 10 more yellow stickers than green stickers.
- How many green stickers are there?
- How many less red stickers than blue stickers?
Red
|
Blue
|
Yellow
|
Green
|
Total
|
1 u
|
3 u |
16 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 15% =
15100 =
320 Number of yellow and green stickers
= 20 u - 1 u - 3 u
= 16 u
20 u = 180
1 u = 180 ÷ 20 = 9
Number of yellow and green stickers
= 16 u
= 16 x 9
= 144
16 u = 2 p + 10
2 p + 10 = 144
2 p = 144 - 10
2 p = 134
1 p = 134 ÷ 2 = 67
Number of green stickers
= 1 p
= 67
(b)
Number of less red stickers than blue stickers
= 3 u - 1 u
= 2 u
= 2 x 9
= 18
Answer(s): (a) 67; (b) 18