Adam has 300 red and green stickers.
He sells 90 red stickers and the number of green stickers becomes 5 times as many as red stickers.
- How many more green stickers than red stickers does Adam have at first?
- How many less red stickers than green stickers does Adam have in the end?
|
Red |
Green |
Before |
1 u + 90 |
5 u |
Change |
- 90 |
No Change |
After |
1 u |
5 u |
(a)
The number of green stickers remains unchanged.
Total number of stickers at first
= 1 u + 90 + 5 u
= 6 u + 90
6 u + 90 = 300
6 u = 300 - 90
6 u = 210
1 u = 210 ÷ 6 = 35
Number of more green stickers than red stickers at first
= 5 u - (1 u + 90)
= 5 u - 1 u - 90
= 4 u - 90
= 4 x 35 - 90
= 140 - 90
= 50
(b)
Number of less red stickers than green stickers in the end
= 5 u - 1 u
= 4 u
= 4 x 35
= 140
Answer(s): (a) 50; (b) 140