PSLE At first, Mary had an equal number of black and silver beads . She gave away
35 of her black beads and some silver beads. In the end, she was left with
14 of her beads. What fraction of the silver beads was Mary left with?
|
Black |
Silver |
Total |
Comparing black beads and silver beads at first |
1x5x2 = 10 u |
1x5x2 = 10 u |
2x5x2 = 20 u |
Before |
5x2 = 10 u |
10 u |
4x5 = 20 u |
Change |
- 3x2 = - 6 u |
- 9 u |
- 1x5 = - 15 u |
After |
2x2 = 4 u |
1 u |
3x5 = 5 u |
The number of black beads at first is repeated. Make the number of black 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 silver beads that Mary was left with
= 5 u - 4 u
= 1 u
Fraction of the silver beads that Mary was left with =
110 Answer(s):
110