Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 7 : 3.
After Bryan gives 50 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 3 : 1.
- Whose number of stickers has changed? Give the answer in number. (Eg Bryan = 1; Adam = 2)
- Number of stickers that Adam has = _____ u
- Change in the number of stickers that Bryan has = _____ u
- 1 u = _____
|
Adam |
Bryan |
Before |
7 x 3 = 21 u |
3 x 3 = 9 u |
Change |
|
- 50 |
After |
3 x 7 = 21 u |
1 x 7 = 7 u |
(a)
Change ratio into units.
The number of stickers that Bryan (1) has remains unchanged.
(b)
LCM of 7 and 3 = 21
Number of stickers that Adam has = 21 u
(c)
Change in the number of stickers that Bryan has
= 9 u - 7 u
= 2 u
(d)
Number of stickers that Bryan gives away = 50
2 u = 50
1 u = 50 ÷ 2 = 25
Answer(s): (a) 1; (b) 21; (c) 2; (d) 25