Elijah had
35 the number of erasers that Harry had at first. After Harry gave Elijah 21 of his erasers, Elijah had
34 the number of erasers that Harry had. How many erasers did Harry have in the end?
| |
Elijah |
Harry |
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 erasers that Elijah and Harry had at first and in the end remains unchanged. Make the total number of erasers the same. LCM of 8 and 7 is 56.
Number of erasers that Harry gave Elijah
= 24 u - 21 u
= 3 u
3 u = 21
1 u = 21 ÷ 3 = 7
Number of erasers that Harry had in the end
= 32 u
= 32 x 7
= 224
Answer(s): 224
