There were some pens in Box J and Box K. After Wesley transferred
35 of the pens from Box J to Box K, the ratio of the number of pens in Box J to that in Box K changed to 3 : 5. Find the ratio of the numbers of pens in Box K to the number of pens in Box J at first.
| |
Box J |
Box K |
| Before |
5x3 =
15 u |
1 u |
| Change |
- 3x3 =
- 9 u |
+ 9 u |
| After |
2x3 =
6 u |
|
Comparing Box J and
Box K in the end |
3x2 =
6 u |
5x2 =
10 u |
The number of pens in Box J in the end is repeated. Make the number of pens in Box J in the end the same. LCM of 2 and 3 is 6.
At first
Box K : Box J
1: 15
Answer(s): 1: 15
