Adam has 120 red stickers, blue stickers and green stickers.
35% of the stickers are red.
There are 10 more blue stickers than green stickers.
- How many green stickers are there?
- How many less red stickers than blue stickers?
Red |
Blue |
Green |
Total |
7 u |
13 u = 78 |
20 u = 120 |
|
1 p + 10 |
1 p |
|
(a)
35% =
35100 =
720 Total number of stickers = 20 u
Number of red stickers = 7 u
Number of blue and green stickers
= 20 u - 7 u
= 13 u
20 u = 120
1 u = 120 ÷ 20 = 6
Number of blue stickers and green stickers
= 13 u
= 13 x 6
= 78
Number of green stickers = 1 p
Number of blue stickers = 1 p + 10
Total number of blue and green stickers
= 1 p + 1 p + 10
= 2 p + 10
2 p + 10 = 78
2 p = 78 - 10
2 p = 68
1 p = 68 ÷ 2 = 34
Number of green stickers
= 1 p
= 34
(b)
Number of red stickers
= 7 u
= 7 x 6
= 42
Number of blue stickers
= 1 p + 10
= 34 + 10
= 44
Number of less red stickers than blue stickers
= 44 - 42
= 2
Answer(s): (a) 34; (b) 2