Adam has 140 green stickers, blue stickers, red stickers and yellow stickers.
5% of the stickers are green.
15% of the stickers are blue.
The rest are red and yellow stickers.
There are 10 more red stickers than yellow stickers.
- How many yellow stickers are there?
- How many more blue stickers than green stickers?
Green
|
Blue
|
Red
|
Yellow
|
Total
|
1 u |
3 u |
16 u
|
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 15% =
15100 =
320 Number of red and yellow stickers
= 20 u - 1 u - 3 u
= 16 u
20 u = 140
1 u = 140 ÷ 20 = 7
Number of red and yellow stickers
= 16 u
= 16 x 7
= 112
16 u = 2 p + 10
2 p + 10 = 112
2 p = 112 - 10
2 p = 102
1 p = 102 ÷ 2 = 51
Number of yellow stickers
= 1 p
= 51
(b)
Number of more blue stickers than green stickers
= 3 u - 1 u
= 2 u
= 2 x 7
= 14
Answer(s): (a) 51; (b) 14