Adam has 280 green stickers, yellow stickers, blue stickers and red stickers.
10% of the stickers are green.
30% 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 more yellow stickers than green stickers?
Green
|
Yellow
|
Blue
|
Red
|
Total
|
1 u |
3 u |
6 u
|
10 u
|
|
|
1 p + 10 |
1 p |
|
(a)
10% =
10100 =
110 30% =
30100 =
310 Number of blue and red stickers
= 10 u - 1 u - 3 u
= 6 u
10 u = 280
1 u = 280 ÷ 10 = 28
Number of blue and red stickers
= 6 u
= 6 x 28
= 168
6 u = 2 p + 10
2 p + 10 = 168
2 p = 168 - 10
2 p = 158
1 p = 158 ÷ 2 = 79
Number of red stickers
= 1 p
= 79
(b)
Number of more yellow stickers than green stickers
= 3 u - 1 u
= 2 u
= 2 x 28
= 56
Answer(s): (a) 79; (b) 56