Lynn had 24 more cards than Zara. After Zara gave away
15 of her cards, Lynn had twice as many cards as Zara. How many cards did Zara have at first?
| |
Lynn |
Zara |
Comparing Lynn and
Zara at first |
24 more |
|
| Before |
8 u |
5 u |
| Change |
|
- 1 u |
| After |
8 u |
4 u |
Comparing Lynn and
Zara in the end |
2x4 =
8 u |
1x4 =
4 u |
Number of cards that Zara had in the end is repeated. Make the number of cards that Zara had in the end the same. LCM of 1 and 4 is 4.
Number of cards that Lynn had at first = 8 u
Number of cards that Lynn had more than Zara at first
= 8 u - 5 u
= 3 u
3 u = 24
1 u = 24 ÷ 3 = 8
Number of cards that Zara had at first
= 5 u
= 5 x 8
= 40
Answer(s): 40
