Adam has 100 blue stickers, green stickers, red stickers and yellow stickers.
15% of the stickers are blue.
35% of the stickers are green.
The rest are red and yellow stickers.
There are 10 more red stickers than yellow stickers.
- How many yellow stickers are there?
- How many less blue stickers than green stickers?
Blue
|
Green
|
Red
|
Yellow
|
Total
|
3 u
|
7 u |
10 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
15% =
15100 =
320 35% =
35100 =
720 Number of red and yellow stickers
= 20 u - 3 u - 7 u
= 10 u
20 u = 100
1 u = 100 ÷ 20 = 5
Number of red and yellow stickers
= 10 u
= 10 x 5
= 50
10 u = 2 p + 10
2 p + 10 = 50
2 p = 50 - 10
2 p = 40
1 p = 40 ÷ 2 = 20
Number of yellow stickers
= 1 p
= 20
(b)
Number of less blue stickers than green stickers
= 7 u - 3 u
= 4 u
= 4 x 5
= 20
Answer(s): (a) 20; (b) 20