PSLE At first, Nora had an equal number of silver and red beads . She gave away
25 of her silver beads and some red beads. In the end, she was left with
23 of her beads. What fraction of the red beads was Nora left with?
|
Silver |
Red |
Total |
Comparing silver beads and red beads at first |
1x5x3 = 15 u |
1x5x3 = 15 u |
2x5x3 = 30 u |
Before |
5x3 = 15 u |
15 u |
3x10 = 30 u |
Change |
- 2x3 = - 6 u |
- 4 u |
- 2x10 = - 10 u |
After |
3x3 = 9 u |
11 u |
1x10 = 20 u |
The number of silver beads at first is repeated. Make the number of silver beads the first the same. LCM of 5 and 1 is 5.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 10 and 3 is 30.
Number of red beads that Nora was left with
= 20 u - 9 u
= 11 u
Fraction of the red beads that Nora was left with =
1115 Answer(s):
1115