Charlie, Adam and Bryan have some stickers in the ratio of 13 : 4 : 1.
Charlie gives Adam and Bryan a total of 35 stickers.
Now they have same number of stickers.
- What is the total number of stickers that they have?
- What is the number of stickers that Charlie gives to Adam?
- What is the number of stickers that Charlie gives to Bryan?
|
Charlie |
Adam |
Bryan |
Before |
13 u |
4 u |
1 u |
Change |
- 7 u |
+ 2 u |
+ 5 u |
After |
6 u |
6 u |
6 u |
(a)
Total number of stickers
= 13 u + 4 u + 1 u
= 18 u
Number of stickers that each must have to be the same number
= 18 u ÷ 3
= 6 u
Number of stickers that Charlie gives away
= 13 u - 6 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Total number of stickers
= 18 u
= 18 x 5
= 90
(b)
Number of stickers that Charlie gives to Adam
= 6 u - 4 u
= 2 u
= 2 x 5
= 10
(c)
Number of stickers that Charlie gives to Bryan
= 6 u - 1 u
= 5 u
= 5 x 5
= 25
Answer(s): (a) 90; (b) 10; (c) 25