Fill in the blanks.
2 boys, Bryan and Adam, have some stickers.
The ratio of Bryan's to Adam's stickers is 7 : 2.
Bryan gives 212 to Adam.
The ratio of Bryan's to Adam's stickers becomes 5 : 9.

1. Number of stickers that Adam has at first = _____ u
2. Change in the number of stickers that Adam has = _____ u
3. Number of stickers that Bryan has at first = _____ u
4. Number of stickers that Bryan has in the end = _____ u

	Bryan	Adam	Total
Before	7 x 14 = 98 u	2 x 14 = 28 u	9 x 14 = 126 u
Change	- 212	+ 212
After	5 x 9 = 45 u	9 x 9 = 81 u	14 x 9 = 126 u

(a)
Change ratio into units.

There is an internal transfer of 212 stickers from Bryan to Adam.

The total remains unchanged.
LCM of 9 and 14 is 126.

Number of stickers that Bryan gives to Adam
= 98 u - 45 u
= 53 u

Number of stickers that Adam has at first = 28 u

(b)
Number of stickers that Adam has in the end = 81 u
 
Change in the number of stickers that Adam has
= 81 u - 28 u
= 53 u

(c) 
Number of stickers that Bryan has at first = 98 u

(d)
Number of stickers that Bryan has in the end = 45 u


Answer(s): (a) 28; (b) 53; (c) 98; (d) 45