Bryan, Adam and Charlie have some stickers in the ratio of 10 : 6 : 5.
Bryan gives Adam and Charlie a total of 81 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 |
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 = 81
1 u = 81 ÷ 3 = 27
Total number of stickers
= 21 u
= 21 x 27
= 567
(b)
Number of stickers that Bryan gives to Adam
= 7 u - 6 u
= 1 u
= 1 x 27
= 27
(c)
Number of stickers that Bryan gives to Charlie
= 7 u - 5 u
= 2 u
= 2 x 27
= 54
Answer(s): (a) 567; (b) 27; (c) 54