Bryan, Charlie and Adam have some stickers in the ratio of 13 : 2 : 3.
Bryan gives Charlie and Adam 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 Bryan gives to Charlie?
- What is the number of stickers that Bryan gives to Adam?
|
Bryan |
Charlie |
Adam |
Before |
13 u |
2 u |
3 u |
Change |
- 7 u |
+ 4 u |
+ 3 u |
After |
6 u |
6 u |
6 u |
(a)
Total number of stickers
= 13 u + 2 u + 3 u
= 18 u
Number of stickers that each must have to be the same number
= 18 u ÷ 3
= 6 u
Number of stickers that Bryan 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 Bryan gives to Charlie
= 6 u - 2 u
= 4 u
= 4 x 5
= 20
(c)
Number of stickers that Bryan gives to Adam
= 6 u - 3 u
= 3 u
= 3 x 5
= 15
Answer(s): (a) 90; (b) 20; (c) 15