Adam has 100 blue stickers, red stickers, green stickers and yellow stickers.
10% of the stickers are blue.
30% of the stickers are red.
The rest are green and yellow stickers.
There are 10 more green stickers than yellow stickers.
- How many yellow stickers are there?
- How many less blue stickers than red stickers?
Blue
|
Red
|
Green
|
Yellow
|
Total
|
1 u
|
3 u |
6 u |
10 u
|
|
|
1 p + 10 |
1 p |
|
(a)
10% =
10100 =
110 30% =
30100 =
310 Number of green and yellow stickers
= 10 u - 1 u - 3 u
= 6 u
10 u = 100
1 u = 100 ÷ 10 = 10
Number of green and yellow stickers
= 6 u
= 6 x 10
= 60
6 u = 2 p + 10
2 p + 10 = 60
2 p = 60 - 10
2 p = 50
1 p = 50 ÷ 2 = 25
Number of yellow stickers
= 1 p
= 25
(b)
Number of less blue stickers than red stickers
= 3 u - 1 u
= 2 u
= 2 x 10
= 20
Answer(s): (a) 25; (b) 20