Adam has 140 green stickers, yellow stickers, blue stickers and red stickers.
15% of the stickers are green.
35% of the stickers are yellow.
The rest are blue and red stickers.
There are 10 more blue stickers than red stickers.
- How many red stickers are there?
- How many less green stickers than yellow stickers?
Green
|
Yellow
|
Blue
|
Red
|
Total
|
3 u
|
7 u |
10 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
15% =
15100 =
320 35% =
35100 =
720 Number of blue and red stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 140
1 u = 140 ÷ 20 = 7
Number of blue and red stickers
= 10 u
= 10 x 7
= 70
10 u = 2 p + 10
2 p + 10 = 70
2 p = 70 - 10
2 p = 60
1 p = 60 ÷ 2 = 30
Number of red stickers
= 1 p
= 30
(b)
Number of less green stickers than yellow stickers
= 7 u - 3 u
= 4 u
= 4 x 7
= 28
Answer(s): (a) 30; (b) 28