David has 13 paperclips more than Gem. How many paperclips must Gem get from David so that she has 21 paperclips more than him?
| |
David |
Gem |
Comparing David
and Gem
at first |
13 more |
|
| Before |
|
|
| Change |
- ? |
+ ? |
| After |
|
|
Comparing David
and Gem
in the end |
|
21 more |
If David gives 13 paperclips to Gem, she will have 13 more paperclips than him. However, Gem must have 21 more paperclips than David in the end. So, David has to give Gem more paperclips.
Number of more paperclips that David has to give to Gem
= (21 - 13) ÷ 2
= 8 ÷ 2
= 4
So after giving 13 paperclips to Gem, David has to give her another 4 more paperclips so that she has 21 paperclips more than him.
Total number of paperclips that Gem needs to get from David
= 13 + 4
= 17
Answer(s): 17
