Adam has 200 blue stickers, yellow stickers, green stickers and red stickers.
10% of the stickers are blue.
30% of the stickers are yellow.
The rest are green and red stickers.
There are 10 more green stickers than red stickers.
- How many red stickers are there?
- How many less blue stickers than yellow stickers?
Blue
|
Yellow
|
Green
|
Red
|
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 red stickers
= 10 u - 1 u - 3 u
= 6 u
10 u = 200
1 u = 200 ÷ 10 = 20
Number of green and red stickers
= 6 u
= 6 x 20
= 120
6 u = 2 p + 10
2 p + 10 = 120
2 p = 120 - 10
2 p = 110
1 p = 110 ÷ 2 = 55
Number of red stickers
= 1 p
= 55
(b)
Number of less blue stickers than yellow stickers
= 3 u - 1 u
= 2 u
= 2 x 20
= 40
Answer(s): (a) 55; (b) 40