Last Tuesday, Daniel had twice as many stamps as Justin. Today, Daniel gives 50 of his stamps to his buddy. Now, Justin has thrice as many stamps as Daniel. How many stamps does Justin have?
| |
Daniel |
Justin |
| Before |
2x3 =
6 u |
1x3 =
3 u |
| Change |
- 50 |
|
| After |
1 u |
3 u |
The number of stamps that Justin had at first and in the end remains unchanged. Make the number of stamps that Justin has the same. LCM of 1 and 3 is 3.
Number of stamps that Daniel gives to his buddy
= 6 u - 1 u
= 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Number of stamps that Justin has
= 3 u
= 3 x 10
= 30
Answer(s): 30
