Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 9 : 10.
After Adam gives 90 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 5 : 6.
- Whose number of stickers has not 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 = _____
|
Adam |
Bryan |
Before |
9 x 3 = 27 u |
10 x 3 = 30 u |
Change |
- 90 |
|
After |
5 x 5 = 25 u |
6 x 5 = 30 u |
(a)
Change ratio into units.
The number of stickers that Bryan (2) has remains unchanged.
(b)
LCM of 10 and 6 = 30
Number of stickers that Bryan has = 30 u
(c)
Change in the number of stickers that Adam has
= 27 u - 25 u
= 2 u
(d)
Number of stickers that Adam gives away = 90
2 u = 90
1 u = 90 ÷ 2 = 45
Answer(s): (a) 2; (b) 30; (c) 2; (d) 45