Adam has 250 red stickers, green stickers, blue stickers and yellow stickers.
10% of the stickers are red.
30% of the stickers are green.
The rest are blue and yellow stickers.
There are 10 more blue stickers than yellow stickers.
- How many yellow stickers are there?
- How many more green stickers than red stickers?
Red
|
Green
|
Blue
|
Yellow
|
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 yellow stickers
= 10 u - 1 u - 3 u
= 6 u
10 u = 250
1 u = 250 ÷ 10 = 25
Number of blue and yellow stickers
= 6 u
= 6 x 25
= 150
6 u = 2 p + 10
2 p + 10 = 150
2 p = 150 - 10
2 p = 140
1 p = 140 ÷ 2 = 70
Number of yellow stickers
= 1 p
= 70
(b)
Number of more green stickers than red stickers
= 3 u - 1 u
= 2 u
= 2 x 25
= 50
Answer(s): (a) 70; (b) 50