Bryan, Adam and Charlie have some stickers in the ratio of 12 : 1 : 5.
Bryan gives Adam and Charlie a total of 108 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 Adam?
- What is the number of stickers that Bryan gives to Charlie?
|
Bryan |
Adam |
Charlie |
Before |
12 u |
1 u |
5 u |
Change |
- 6 u |
+ 5 u |
+ 1 u |
After |
6 u |
6 u |
6 u |
(a)
Total number of stickers
= 12 u + 1 u + 5 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
= 12 u - 6 u
= 6 u
6 u = 108
1 u = 108 ÷ 6 = 18
Total number of stickers
= 18 u
= 18 x 18
= 324
(b)
Number of stickers that Bryan gives to Adam
= 6 u - 1 u
= 5 u
= 5 x 18
= 90
(c)
Number of stickers that Bryan gives to Charlie
= 6 u - 5 u
= 1 u
= 1 x 18
= 18
Answer(s): (a) 324; (b) 90; (c) 18