Adam has 160 green stickers, red stickers, yellow stickers and blue stickers.
15% of the stickers are green.
35% of the stickers are red.
The rest are yellow and blue stickers.
There are 10 more yellow stickers than blue stickers.
- How many blue stickers are there?
- How many more red stickers than green stickers?
Green
|
Red
|
Yellow
|
Blue
|
Total
|
3 u |
7 u |
10 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
15% =
15100 =
320 35% =
35100 =
720 Number of yellow and blue stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 160
1 u = 160 ÷ 20 = 8
Number of yellow and blue stickers
= 10 u
= 10 x 8
= 80
10 u = 2 p + 10
2 p + 10 = 80
2 p = 80 - 10
2 p = 70
1 p = 70 ÷ 2 = 35
Number of blue stickers
= 1 p
= 35
(b)
Number of more red stickers than green stickers
= 7 u - 3 u
= 4 u
= 4 x 8
= 32
Answer(s): (a) 35; (b) 32