Last Friday, George had twice as many marbles as Charlie. Today, George gives 12 of his marbles to his cousin. Now, Charlie has twice as many marbles as George. How many marbles does Charlie have?
| |
George |
Charlie |
| Before |
2x2 =
4 u |
1x2 =
2 u |
| Change |
- 12 |
|
| After |
1 u |
2 u |
The number of marbles that Charlie had at first and in the end remains unchanged. Make the number of marbles that Charlie has the same. LCM of 1 and 2 is 2.
Number of marbles that George gives to his cousin
= 4 u - 1 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Number of marbles that Charlie has
= 2 u
= 2 x 4
= 8
Answer(s): 8
