Sam and Ahmad had 87 staplers. After Sam gave 11 staplers to Ahmad. Ahmad, in return, gave half of his staplers to Sam. In the end, Sam had twice as many staplers as Ahmad. How many staplers did Sam have at first?
| |
Sam |
Ahmad |
Total |
| Before |
1 u + 11 |
2 u - 11 |
87 |
| Change 1 |
- 11 |
+ 11 |
|
| After 1 |
1 u |
2 u |
|
| Change 2 |
+ 1 u |
- 1 u |
|
| After 2 |
2 u |
1 u |
87 |
Total number of staplers that Sam and Ahmad had at first and in the end remains unchanged.
Total number of staplers
= 2 u + 1 u
= 3 u
1 u = 87 ÷ 3 = 29
Number of staplers that Sam had at first
= 1 u + 11
= 29 + 11
= 40
Answer(s): 40
