Vaidev had
25 the number of pens that Warren had at first. After Warren gave Vaidev 10 of his pens, Vaidev had
35 the number of pens that Warren had. How many pens did Vaidev have at first?
| |
Vaidev |
Warren |
Total |
| Before |
2x8 =
16 u |
5x8 =
40 u |
7x8 =
56 u |
| Change |
+ 5 u |
- 5 u |
|
| After |
3x7 =
21 u |
5x7 =
35 u |
8x7 =
56 u |
The total number of pens that Vaidev and Warren had at first and in the end remains unchanged. Make the total number of pens the same. LCM of 7 and 8 is 56.
Number of pens that Warren gave Vaidev
= 21 u - 16 u
= 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Number of pens that Vaidev had at first
= 16 u
= 16 x 2
= 32
Answer(s): 32
