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