George and Harry had a total of 66 marbles. Harry had half as many marbles as George. How many marbles must George give to Harry so they have an equal number of marbles?
|
George |
Harry |
Total |
Before |
2 u |
1 u |
66 |
Change |
- ? |
+ ? |
|
After |
1 |
1 |
|
Total number of marbles at first = 3 u
1 u = 66 ÷ 3 = 22
George and Harry have an equal number of marbles in the end.
Number of marbles that Harry has in the end
= 66 ÷ 2
= 33
Number of marbles that George must give to Harry
= 33 - 22
= 11
Answer(s): 11