Charlie, Adam and Bryan have some stickers in the ratio of 13 : 2 : 6.
Charlie gives Adam and Bryan 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 Charlie gives to Adam?
- What is the number of stickers that Charlie gives to Bryan?
|
Charlie |
Adam |
Bryan |
Before |
13 u |
2 u |
6 u |
Change |
- 6 u |
+ 5 u |
+ 1 u |
After |
7 u |
7 u |
7 u |
(a)
Total number of stickers
= 13 u + 2 u + 6 u
= 21 u
Number of stickers that each must have to be the same number
= 21 u ÷ 3
= 7 u
Number of stickers that Charlie gives away
= 13 u - 7 u
= 6 u
6 u = 108
1 u = 108 ÷ 6 = 18
Total number of stickers
= 21 u
= 21 x 18
= 378
(b)
Number of stickers that Charlie gives to Adam
= 7 u - 2 u
= 5 u
= 5 x 18
= 90
(c)
Number of stickers that Charlie gives to Bryan
= 7 u - 6 u
= 1 u
= 1 x 18
= 18
Answer(s): (a) 378; (b) 90; (c) 18