PSLE Pamela had an equal number of white and grey beads. She gave 37 white beads and 28 grey beads to Mary. She gave the remaining beads to Nora. Nora was given 3 white beads for every 6 grey beads. How many beads did Pamela have at first?
|
White |
Grey |
Before |
3 u + 37 |
6 u + 28 |
Change |
- 37 |
- 28 |
After |
3 u |
6 u |
The number of white and grey beads is equal at first.
3 u + 37 = 6 u + 28
6 u - 3 u = 37 - 28
3 u = 9
1 u = 9 ÷ 3 = 3
Number of white beads that Pamela had at first
= 3 u + 37
= 3 x 3 + 37
= 9 + 37
= 46
Number of beads that Pamela had at first
= 2 x 46
= 92
Answer(s): 92