Lucy had 36 more beads than Shiyun. After Shiyun gave away
13 of her beads, Lucy had thrice as many beads as Shiyun. How many beads did Shiyun have at first?
| |
Lucy |
Shiyun |
Comparing Lucy and
Shiyun at first |
36 more |
|
| Before |
6 u |
3 u |
| Change |
|
- 1 u |
| After |
6 u |
2 u |
Comparing Lucy and
Shiyun in the end |
3x2 =
6 u |
1x2 =
2 u |
Number of beads that Shiyun had in the end is repeated. Make the number of beads that Shiyun had in the end the same. LCM of 1 and 2 is 2.
Number of beads that Lucy had at first = 6 u
Number of beads that Lucy had more than Shiyun at first
= 6 u - 3 u
= 3 u
3 u = 36
1 u = 36 ÷ 3 = 12
Number of beads that Shiyun had at first
= 3 u
= 3 x 12
= 36
Answer(s): 36
