PSLE Shiyun had an equal number of green and blue beads. She gave 29 green beads and 13 blue beads to Mary. She gave the remaining beads to Nora. Nora was given 4 green beads for every 6 blue beads. How many beads did Shiyun have at first?
|
Green |
Blue |
Before |
4 u + 29 |
6 u + 13 |
Change |
- 29 |
- 13 |
After |
4 u |
6 u |
The number of green and blue beads is equal at first.
4 u + 29 = 6 u + 13
6 u - 4 u = 29 - 13
2 u = 16
1 u = 16 ÷ 2 = 8
Number of green beads that Shiyun had at first
= 4 u + 29
= 4 x 8 + 29
= 32 + 29
= 61
Number of beads that Shiyun had at first
= 2 x 61
= 122
Answer(s): 122