Adam has 150 yellow stickers, green stickers, blue stickers and red stickers.
10% of the stickers are yellow.
30% of the stickers are green.
The rest are blue and red stickers.
There are 10 more blue stickers than red stickers.
- How many red stickers are there?
- How many less yellow stickers than green stickers?
Yellow
|
Green
|
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 = 150
1 u = 150 ÷ 10 = 15
Number of blue and red stickers
= 6 u
= 6 x 15
= 90
6 u = 2 p + 10
2 p + 10 = 90
2 p = 90 - 10
2 p = 80
1 p = 80 ÷ 2 = 40
Number of red stickers
= 1 p
= 40
(b)
Number of less yellow stickers than green stickers
= 3 u - 1 u
= 2 u
= 2 x 15
= 30
Answer(s): (a) 40; (b) 30