Adam has 350 stickers.
After
16 of the red stickers and
20 green stickers are given away,
there is an equal number of red and green stickers left.
- How many red stickers are there in the end?
- How many more red stickers than green stickers are there at first?
- How many red stickers are given away?
|
Red stickers |
Green stickers |
Total |
Before |
6 u |
5 u + 20 |
350 |
Change |
- 1 u |
- 20 |
|
After |
5 u |
5 u |
|
(a)
Fraction of the red stickers left
= 1 -
16 =
56 Total number of stickers at first
= 6 u + 5 u + 20
= 11 u + 20
11 u + 20 = 350
11 u = 350 - 20
11 u = 330
1 u = 330 ÷ 11 = 30
Number of red stickers in the end
= 5 u
= 5 x 30
= 150
(b)
Number of more red stickers than green stickers at first
= 6 u - (5 u + 20)
= 6 u - 5 u - 20
= 1 u - 20
= 1 x 30 - 20
= 30 - 20
= 10
(c)
Number of red stickers given away
= 1 u
= 30
Answer(s): (a) 150; (b) 10; (c) 30