Adam has 180 green stickers, red stickers, blue stickers and yellow stickers.
15% of the stickers are green.
35% of the stickers are red.
The rest are blue and yellow stickers.
There are 10 more blue stickers than yellow stickers.
- How many yellow stickers are there?
- How many less green stickers than red stickers?
Green
|
Red
|
Blue
|
Yellow
|
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 yellow stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 180
1 u = 180 ÷ 20 = 9
Number of blue and yellow stickers
= 10 u
= 10 x 9
= 90
10 u = 2 p + 10
2 p + 10 = 90
2 p = 90 - 10
2 p = 80
1 p = 80 ÷ 2 = 40
Number of yellow stickers
= 1 p
= 40
(b)
Number of less green stickers than red stickers
= 7 u - 3 u
= 4 u
= 4 x 9
= 36
Answer(s): (a) 40; (b) 36