Yesterday, David had 16 more buttons than Paul. Today, David gave Paul
37 of his buttons. As a result, he has half as many buttons as Paul now. How many buttons did David have yesterday?
| |
David |
Paul |
More |
| Before |
7 u |
5 u |
2 u |
| Change |
- 3 u |
+ 3 u |
|
| After |
4 u |
8 u |
|
Comparing David and
Paul in the end |
1
|
2
|
|
Number of buttons that Paul has now
= 2 x 4 u
= 8 u
Number of buttons that David had more than Paul yesterday
= 7 u - 5 u
= 2 u
2 u = 16
1 u = 16 ÷ 2 = 8
Number of buttons that David had yesterday
= 7 u
= 7 x 8
= 56
Answer(s): 56
