PSLE At first, Nora had an equal number of silver and red beads . She gave away
34 of her silver beads and some red beads. In the end, she was left with
35 of her beads. What fraction of the red beads did Nora give away?
|
Silver |
Red |
Total |
Comparing silver beads and red beads at first |
1x4x5 = 20 u |
1x4x5 = 20 u |
2x4x5 = 40 u |
Before |
4x5 = 20 u |
20 u |
5x8 = 40 u |
Change |
- 3x5 = - 15 u |
- 1 u |
- 3x8 = - 16 u |
After |
1x5 = 5 u |
19 u |
2x8 = 24 u |
After
1x5 =
5 u19 u
2x8 =
24 uThe number of silver beads at first is repeated. Make the number of silver beads the first the same. LCM of 4 and 1 is 4.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 8 and 5 is 40.
Number of red beads that Nora was left with
= 24 u - 5 u
= 19 u
Number of red beads that Nora gave away
= 20 u - 19 u
= 1 u
Fraction of the red beads that Nora gave away =
120 Answer(s):
120