Fill in the blanks.
The ratio of Bryan's stickers to Adam's stickers is 5 : 2.
After Adam gives 40 stickers away,
The ratio of Bryan's stickers to Adam's stickers becomes 7 : 2.
- Whose number of stickers has changed? Give the answer in number. (Eg Adam = 1; Bryan = 2)
- Number of stickers that Bryan has = _____ u
- Change in the number of stickers that Adam has = _____ u
- 1 u = _____
|
Bryan |
Adam |
Before |
5 x 7 = 35 u |
2 x 7 = 14 u |
Change |
|
- 40 |
After |
7 x 5 = 35 u |
2 x 5 = 10 u |
(a)
Change ratio into units.
The number of stickers that Adam (1) has remains unchanged.
(b)
LCM of 5 and 7 = 35
Number of stickers that Bryan has = 35 u
(c)
Change in the number of stickers that Adam has
= 14 u - 10 u
= 4 u
(d)
Number of stickers that Adam gives away = 40
4 u = 40
1 u = 40 ÷ 4 = 10
Answer(s): (a) 1; (b) 35; (c) 4; (d) 10