Bryan, Charlie and Adam have some stickers in the ratio of 10 : 6 : 5.
Bryan gives Charlie and Adam a total of 60 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 |
10 u |
6 u |
5 u |
Change |
- 3 u |
+ 1 u |
+ 2 u |
After |
7 u |
7 u |
7 u |
(a)
Total number of stickers
= 10 u + 6 u + 5 u
= 21 u
Number of stickers that each must have to be the same number
= 21 u ÷ 3
= 7 u
Number of stickers that Bryan gives away
= 10 u - 7 u
= 3 u
3 u = 60
1 u = 60 ÷ 3 = 20
Total number of stickers
= 21 u
= 21 x 20
= 420
(b)
Number of stickers that Bryan gives to Charlie
= 7 u - 6 u
= 1 u
= 1 x 20
= 20
(c)
Number of stickers that Bryan gives to Adam
= 7 u - 5 u
= 2 u
= 2 x 20
= 40
Answer(s): (a) 420; (b) 20; (c) 40