Andy has 11 post-it notes more than Emily. How many post-it notes must Emily get from Andy so that she has 21 post-it notes more than him?
| |
Andy |
Emily |
Comparing Andy
and Emily
at first |
11 more |
|
| Before |
|
|
| Change |
- ? |
+ ? |
| After |
|
|
Comparing Andy
and Emily
in the end |
|
21 more |
If Andy gives 11 post-it notes to Emily, she will have 11 more post-it notes than him. However, Emily must have 21 more post-it notes than Andy in the end. So, Andy has to give Emily more post-it notes.
Number of more post-it notes that Andy has to give to Emily
= (21 - 11) ÷ 2
= 10 ÷ 2
= 5
So after giving 11 post-it notes to Emily, Andy has to give her another 5 more post-it notes so that she has 21 post-it notes more than him.
Total number of post-it notes that Emily needs to get from Andy
= 11 + 5
= 16
Answer(s): 16
