PSLE At first, Nora had an equal number of red and blue beads . She gave away
45 of her red beads and some blue beads. In the end, she was left with
14 of her beads. What fraction of the blue beads was Nora left with?
|
Red |
Blue |
Total |
Comparing red beads and blue beads at first |
1x5x2 = 10 u |
1x5x2 = 10 u |
2x5x2 = 20 u |
Before |
5x2 = 10 u |
10 u |
4x5 = 20 u |
Change |
- 4x2 = - 8 u |
- 7 u |
- 1x5 = - 15 u |
After |
1x2 = 2 u |
3 u |
3x5 = 5 u |
The number of red beads at first is repeated. Make the number of red 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 4 is 20.
Number of blue beads that Nora was left with
= 5 u - 2 u
= 3 u
Fraction of the blue beads that Nora was left with =
310 Answer(s):
310