Albert and Vincent had a total of 138 pens. Vincent had half as many pens as Albert. How many pens must Albert give to Vincent so they have an equal number of pens?
| |
Albert |
Vincent |
Total |
| Before |
2 u |
1 u |
138 |
| Change |
- ? |
+ ? |
|
| After |
1 |
1 |
|
Total number of pens at first = 3 u
1 u = 138 ÷ 3 = 46
Albert and Vincent have an equal number of pens in the end.
Number of pens that Vincent has in the end
= 138 ÷ 2
= 69
Number of pens that Albert must give to Vincent
= 69 - 46
= 23
Answer(s): 23
