Adam has 288 red stickers.
He has 6 times as many red stickers as blue stickers.
After he buys an equal number of red and blue stickers,
the number of red stickers is 5 times that of the blue stickers.
- How many red stickers are there in the end?
- How many blue stickers are there in the end?
- How many stickers are there in the end?
- How many stickers does Adam buy?
|
Red stickers |
Blue stickers |
Difference |
Before |
6 x 4 = 24 u |
1 x 4 = 4 u |
5 x 4 = 20 u |
Change |
+ ? |
+ ? |
|
After |
5 x 5 = 25 u |
1 x 5 = 5 u |
4 x 5 = 20 u |
(a)
The difference in the number between the red and blue stickers at first and in the end remains unchanged.
LCM of 5 and 4 is 20.
24 u = 288
1 u = 288 ÷ 24 = 12
Number of red stickers in the end
= 25 u
= 25 x 12
= 300
(b)
Number of blue stickers in the end
= 5 u
= 5 x 12
= 60
(c)
Total number of stickers in the end
= 300 + 60
= 360
(d)
Total number of stickers that Adam buys
= (25 u - 24 u) x 2
= 1 u x 2
= 2 u
= 2 x 12
= 24
Answer(s): (a) 300; (b) 60; (c) 360; (d) 24