Adam has 100 green stickers, yellow stickers, blue stickers and red stickers.
5% 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
|
1 u
|
7 u |
12 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 35% =
35100 =
720 Number of blue and red stickers
= 20 u - 1 u - 7 u
= 12 u
20 u = 100
1 u = 100 ÷ 20 = 5
Number of blue and red stickers
= 12 u
= 12 x 5
= 60
12 u = 2 p + 10
2 p + 10 = 60
2 p = 60 - 10
2 p = 50
1 p = 50 ÷ 2 = 25
Number of red stickers
= 1 p
= 25
(b)
Number of less green stickers than yellow stickers
= 7 u - 1 u
= 6 u
= 6 x 5
= 30
Answer(s): (a) 25; (b) 30