Adam has 280 blue stickers, green stickers, red stickers and yellow stickers.
5% 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 more green stickers than blue stickers?
Blue
|
Green
|
Red
|
Yellow
|
Total
|
1 u |
7 u |
12 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 35% =
35100 =
720 Number of red and yellow stickers
= 20 u - 1 u - 7 u
= 12 u
20 u = 280
1 u = 280 ÷ 20 = 14
Number of red and yellow stickers
= 12 u
= 12 x 14
= 168
12 u = 2 p + 10
2 p + 10 = 168
2 p = 168 - 10
2 p = 158
1 p = 158 ÷ 2 = 79
Number of yellow stickers
= 1 p
= 79
(b)
Number of more green stickers than blue stickers
= 7 u - 1 u
= 6 u
= 6 x 14
= 84
Answer(s): (a) 79; (b) 84