Fill in the blanks.
2 boys, Bryan and Adam, have some stickers.
The ratio of Bryan's to Adam's stickers is 5 : 4.
Bryan gives 40 to Adam.
The ratio of Bryan's to Adam's stickers becomes 3 : 4.
- Number of stickers that Adam has at first = _____ u
- Change in the number of stickers that Adam has = _____ u
- Number of stickers that Bryan has at first = _____ u
- Number of stickers that Bryan has in the end = _____ u
|
Bryan |
Adam |
Total |
Before |
5 x 7 = 35 u |
4 x 7 = 28 u |
9 x 7 = 63 u |
Change |
- 40 |
+ 40 |
|
After |
3 x 9 = 27 u |
4 x 9 = 36 u |
7 x 9 = 63 u |
(a)
Change ratio into units.
There is an internal transfer of 40 stickers from Bryan to Adam.
The total remains unchanged.
LCM of 9 and 7 is 63.
Number of stickers that Bryan gives to Adam
= 35 u - 27 u
= 8 u
Number of stickers that Adam has at first = 28 u
(b)
Number of stickers that Adam has in the end = 36 u
Change in the number of stickers that Adam has
= 36 u - 28 u
= 8 u
(c)
Number of stickers that Bryan has at first = 35 u
(d)
Number of stickers that Bryan has in the end = 27 u
Answer(s): (a) 28; (b) 8; (c) 35; (d) 27