Ben had
38 the number of pens that Fred had at first. After Fred gave Ben 45 of his pens, Ben had
35 the number of pens that Fred had. How many pens did Fred have in the end?
|
Ben |
Fred |
Total |
Before |
3x8 = 24 u |
8x8 = 64 u |
11x8 = 88 u |
Change |
+ 9 u |
- 9 u |
|
After |
3x11 = 33 u |
5x11 = 55 u |
8x11 = 88 u |
The total number of pens that Ben and Fred had at first and in the end remains unchanged. Make the total number of pens the same. LCM of 11 and 8 is 88.
Number of pens that Fred gave Ben
= 33 u - 24 u
= 9 u
9 u = 45
1 u = 45 ÷ 9 = 5
Number of pens that Fred had in the end
= 55 u
= 55 x 5
= 275
Answer(s): 275