Adam has 120 red stickers, yellow stickers, blue stickers and green stickers.
10% of the stickers are red.
30% of the stickers are yellow.
The rest are blue and green stickers.
There are 10 more blue stickers than green stickers.
- How many green stickers are there?
- How many more yellow stickers than red stickers?
Red
|
Yellow
|
Blue
|
Green
|
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 green stickers
= 10 u - 1 u - 3 u
= 6 u
10 u = 120
1 u = 120 ÷ 10 = 12
Number of blue and green stickers
= 6 u
= 6 x 12
= 72
6 u = 2 p + 10
2 p + 10 = 72
2 p = 72 - 10
2 p = 62
1 p = 62 ÷ 2 = 31
Number of green stickers
= 1 p
= 31
(b)
Number of more yellow stickers than red stickers
= 3 u - 1 u
= 2 u
= 2 x 12
= 24
Answer(s): (a) 31; (b) 24