Neave and Ryan had 81 staplers. After Neave gave 21 staplers to Ryan. Ryan, in return, gave half of his staplers to Neave. In the end, Neave had twice as many staplers as Ryan. How many staplers did Neave have at first?
| |
Neave |
Ryan |
Total |
| Before |
1 u + 21 |
2 u - 21 |
81 |
| Change 1 |
- 21 |
+ 21 |
|
| After 1 |
1 u |
2 u |
|
| Change 2 |
+ 1 u |
- 1 u |
|
| After 2 |
2 u |
1 u |
81 |
Total number of staplers that Neave and Ryan had at first and in the end remains unchanged.
Total number of staplers
= 2 u + 1 u
= 3 u
1 u = 81 ÷ 3 = 27
Number of staplers that Neave had at first
= 1 u + 21
= 27 + 21
= 48
Answer(s): 48
