Last Saturday, Andy had twice as many marbles as Carl. Today, Andy gives 63 of his marbles to his cousin. Now, Carl has four times as many marbles as Andy. How many marbles does Carl have?
|
Andy |
Carl |
Before |
2x4 = 8 u |
1x4 = 4 u |
Change |
- 63 |
|
After |
1 u |
4 u |
The number of marbles that Carl had at first and in the end remains unchanged. Make the number of marbles that Carl has the same. LCM of 1 and 4 is 4.
Number of marbles that Andy gives to his cousin
= 8 u - 1 u
= 7 u
7 u = 63
1 u = 63 ÷ 7 = 9
Number of marbles that Carl has
= 4 u
= 4 x 9
= 36
Answer(s): 36