Adam has 140 red stickers, yellow stickers, green stickers and blue stickers.
5% of the stickers are red.
35% of the stickers are yellow.
The rest are green and blue stickers.
There are 10 more green stickers than blue stickers.
- How many blue stickers are there?
- How many less red stickers than yellow stickers?
Red
|
Yellow
|
Green
|
Blue
|
Total
|
1 u
|
7 u |
12 u |
20 u
|
|
|
1 p + 10 |
1 p |
|
(a)
5% =
5100 =
120 35% =
35100 =
720 Number of green and blue stickers
= 20 u - 1 u - 7 u
= 12 u
20 u = 140
1 u = 140 ÷ 20 = 7
Number of green and blue stickers
= 12 u
= 12 x 7
= 84
12 u = 2 p + 10
2 p + 10 = 84
2 p = 84 - 10
2 p = 74
1 p = 74 ÷ 2 = 37
Number of blue stickers
= 1 p
= 37
(b)
Number of less red stickers than yellow stickers
= 7 u - 1 u
= 6 u
= 6 x 7
= 42
Answer(s): (a) 37; (b) 42