Adam, Bryan and Charlie have some stickers in the ratio of 13 : 6 : 2.
Adam gives Bryan and Charlie a total of 78 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 Adam gives to Bryan?
- What is the number of stickers that Adam gives to Charlie?
|
Adam |
Bryan |
Charlie |
Before |
13 u |
6 u |
2 u |
Change |
- 6 u |
+ 1 u |
+ 5 u |
After |
7 u |
7 u |
7 u |
(a)
Total number of stickers
= 13 u + 6 u + 2 u
= 21 u
Number of stickers that each must have to be the same number
= 21 u ÷ 3
= 7 u
Number of stickers that Adam gives away
= 13 u - 7 u
= 6 u
6 u = 78
1 u = 78 ÷ 6 = 13
Total number of stickers
= 21 u
= 21 x 13
= 273
(b)
Number of stickers that Adam gives to Bryan
= 7 u - 6 u
= 1 u
= 1 x 13
= 13
(c)
Number of stickers that Adam gives to Charlie
= 7 u - 2 u
= 5 u
= 5 x 13
= 65
Answer(s): (a) 273; (b) 13; (c) 65