Julian had
34 as many buttons as Eric. Eric had
47 as many buttons as Marion. After Julian and Marion gave 8 buttons to Eric, Eric had thrice as many buttons as Julian. Marion then had the same number of buttons as Eric.
- What was the ratio of the number of buttons Julian had to the number of buttons Marion had in the beginning? Answer in simplest form.
- How many buttons did Eric have in the end?
Julian |
Eric |
Marion |
3 |
4 |
|
|
4 |
7 |
3 |
4 |
7 |
(a)
The number of buttons that Eric is repeated.
Ratio of the number of buttons that Julian had to the number of buttons that Marion had in the beginning = 3 : 7
|
Julian |
Eric |
Marion |
Total |
Before |
3x1 = 3 u |
4x1 = 4 u |
7x1 = 7 u |
14x1 = 14 u |
Change |
- 8 |
+ 16 |
- 8 |
|
After |
1x2 = 2 u |
3x2 = 6 u |
3x2 = 6 u |
7x2 = 14 u |
The total number of buttons at first and in the end remains unchanged. Make the total number of buttons the same. LCM of 14 and 7 is 14.
Number of buttons that Eric received from Julian and Marion
= 2 x 8
= 16
Number of buttons that Eric received from Julian and Marion
= 2 x 1 u
= 2 u
2 u = 8
1 u = 8 ÷ 2 = 4
Number of buttons that Ashley had in the end
= 6 u
= 6 x 4
= 24
Answer(s): (a) 3 : 7; (b) 24