Adam has 300 green and red stickers.
He sells 30 green stickers and the number of red stickers becomes 5 times as many as green stickers.
- How many more red stickers than green stickers does Adam have at first?
- How many less green stickers than red stickers does Adam have in the end?
|
Green |
Red |
Before |
1 u + 30 |
5 u |
Change |
- 30 |
No Change |
After |
1 u |
5 u |
(a)
The number of red stickers remains unchanged.
Total number of stickers at first
= 1 u + 30 + 5 u
= 6 u + 30
6 u + 30 = 300
6 u = 300 - 30
6 u = 270
1 u = 270 ÷ 6 = 45
Number of more red stickers than green stickers at first
= 5 u - (1 u + 30)
= 5 u - 1 u - 30
= 4 u - 30
= 4 x 45 - 30
= 180 - 30
= 150
(b)
Number of less green stickers than red stickers in the end
= 5 u - 1 u
= 4 u
= 4 x 45
= 180
Answer(s): (a) 150; (b) 180