PSLE At first, Mary had an equal number of pink and orange beads . She gave away
23 of her pink beads and some orange beads. In the end, she was left with
25 of her beads. What fraction of the orange beads was Mary left with?
|
Pink |
Orange |
Total |
Comparing pink beads and orange beads at first |
1x3x5 = 15 u |
1x3x5 = 15 u |
2x3x5 = 30 u |
Before |
3x5 = 15 u |
15 u |
5x6 = 30 u |
Change |
- 2x5 = - 10 u |
- 8 u |
- 2x6 = - 18 u |
After |
1x5 = 5 u |
7 u |
3x6 = 12 u |
The number of pink beads at first is repeated. Make the number of pink beads the first the same. LCM of 3 and 1 is 3.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 6 and 5 is 30.
Number of orange beads that Mary was left with
= 12 u - 5 u
= 7 u
Fraction of the orange beads that Mary was left with =
715 Answer(s):
715