Emily had 16 more pens than Eva. After Eva gave away
16 of her pens, Emily had twice as many pens as Eva. How many pens did Eva have at first?
| |
Emily |
Eva |
Comparing Emily and
Eva at first |
16 more |
|
| Before |
10 u |
6 u |
| Change |
|
- 1 u |
| After |
10 u |
5 u |
Comparing Emily and
Eva in the end |
2x5 =
10 u |
1x5 =
5 u |
Number of pens that Eva had in the end is repeated. Make the number of pens that Eva had in the end the same. LCM of 1 and 5 is 5.
Number of pens that Emily had at first = 10 u
Number of pens that Emily had more than Eva at first
= 10 u - 6 u
= 4 u
4 u = 16
1 u = 16 ÷ 4 = 4
Number of pens that Eva had at first
= 6 u
= 6 x 4
= 24
Answer(s): 24
