Gabriel had
25 the number of pens that Fred had at first. After Fred gave Gabriel 72 of his pens, Gabriel had
47 the number of pens that Fred had. How many pens did Gabriel have at first?
|
Gabriel |
Fred |
Total |
Before |
2x11 = 22 u |
5x11 = 55 u |
7x11 = 77 u |
Change |
+ 6 u |
- 6 u |
|
After |
4x7 = 28 u |
7x7 = 49 u |
11x7 = 77 u |
The total number of pens that Gabriel and Fred had at first and in the end remains unchanged. Make the total number of pens the same. LCM of 7 and 11 is 77.
Number of pens that Fred gave Gabriel
= 28 u - 22 u
= 6 u
6 u = 72
1 u = 72 ÷ 6 = 12
Number of pens that Gabriel had at first
= 22 u
= 22 x 12
= 264
Answer(s): 264