PSLE Sarah had an equal number of brown and blue beads. She gave 37 brown beads and 27 blue beads to Mary. She gave the remaining beads to Nora. Nora was given 4 brown beads for every 6 blue beads. How many beads did Sarah have at first?
|
Brown |
Blue |
Before |
4 u + 37 |
6 u + 27 |
Change |
- 37 |
- 27 |
After |
4 u |
6 u |
The number of brown and blue beads is equal at first.
4 u + 37 = 6 u + 27
6 u - 4 u = 37 - 27
2 u = 10
1 u = 10 ÷ 2 = 5
Number of brown beads that Sarah had at first
= 4 u + 37
= 4 x 5 + 37
= 20 + 37
= 57
Number of beads that Sarah had at first
= 2 x 57
= 114
Answer(s): 114