Ken and Julian had 84 staplers. After Ken gave 11 staplers to Julian. Julian, in return, gave half of his staplers to Ken. In the end, Ken had twice as many staplers as Julian. How many staplers did Ken have at first?
| |
Ken |
Julian |
Total |
| Before |
1 u + 11 |
2 u - 11 |
84 |
| Change 1 |
- 11 |
+ 11 |
|
| After 1 |
1 u |
2 u |
|
| Change 2 |
+ 1 u |
- 1 u |
|
| After 2 |
2 u |
1 u |
84 |
Total number of staplers that Ken and Julian had at first and in the end remains unchanged.
Total number of staplers
= 2 u + 1 u
= 3 u
1 u = 84 ÷ 3 = 28
Number of staplers that Ken had at first
= 1 u + 11
= 28 + 11
= 39
Answer(s): 39
