Last Saturday, Carl had twice as many buttons as Tim. Today, Carl gives 28 of his buttons to his cousin. Now, Tim has four times as many buttons as Carl. How many buttons does Tim have?
| |
Carl |
Tim |
| Before |
2x4 =
8 u |
1x4 =
4 u |
| Change |
- 28 |
|
| After |
1 u |
4 u |
The number of buttons that Tim had at first and in the end remains unchanged. Make the number of buttons that Tim has the same. LCM of 1 and 4 is 4.
Number of buttons that Carl gives to his cousin
= 8 u - 1 u
= 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Number of buttons that Tim has
= 4 u
= 4 x 4
= 16
Answer(s): 16
