Adam has 160 blue stickers, green stickers, yellow stickers and red stickers.
5% of the stickers are blue.
15% of the stickers are green.
The rest are yellow and red stickers.
There are 10 more yellow stickers than red stickers.
- How many red stickers are there?
- How many less blue stickers than green stickers?
Blue
|
Green
|
Yellow
|
Red
|
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 red stickers
= 20 u - 1 u - 3 u
= 16 u
20 u = 160
1 u = 160 ÷ 20 = 8
Number of yellow and red stickers
= 16 u
= 16 x 8
= 128
16 u = 2 p + 10
2 p + 10 = 128
2 p = 128 - 10
2 p = 118
1 p = 118 ÷ 2 = 59
Number of red stickers
= 1 p
= 59
(b)
Number of less blue stickers than green stickers
= 3 u - 1 u
= 2 u
= 2 x 8
= 16
Answer(s): (a) 59; (b) 16