Fred had
35 the number of stamps that Andy had at first. After Andy gave Fred 33 of his stamps, Fred had
34 the number of stamps that Andy had. How many stamps did Fred have at first?
|
Fred |
Andy |
Total |
Before |
3x7 = 21 u |
5x7 = 35 u |
8x7 = 56 u |
Change |
+ 3 u |
- 3 u |
|
After |
3x8 = 24 u |
4x8 = 32 u |
7x8 = 56 u |
The total number of stamps that Fred and Andy had at first and in the end remains unchanged. Make the total number of stamps the same. LCM of 8 and 7 is 56.
Number of stamps that Andy gave Fred
= 24 u - 21 u
= 3 u
3 u = 33
1 u = 33 ÷ 3 = 11
Number of stamps that Fred had at first
= 21 u
= 21 x 11
= 231
Answer(s): 231