Adam has 210 red stickers, blue stickers, yellow stickers and green stickers.
5% of the stickers are red.
15% of the stickers are blue.
The rest are yellow and green stickers.
There are 10 more yellow stickers than green stickers.
- How many green stickers are there?
- How many more blue stickers than red stickers?
Red
|
Blue
|
Yellow
|
Green
|
Total
|
1 u |
3 u |
16 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 15% =
15100 =
320 Number of yellow and green stickers
= 20 u - 1 u - 3 u
= 16 u
20 u = 210
1 u = 210 ÷ 20 = 10.5
Number of yellow and green stickers
= 16 u
= 16 x 10.5
= 168
16 u = 2 p + 10
2 p + 10 = 168
2 p = 168 - 10
2 p = 158
1 p = 158 ÷ 2 = 79
Number of green stickers
= 1 p
= 79
(b)
Number of more blue stickers than red stickers
= 3 u - 1 u
= 2 u
= 2 x 10.5
= 21
Answer(s): (a) 79; (b) 21