PSLE At first, Tina had an equal number of purple and red beads . She gave away
23 of her purple beads and some red beads. In the end, she was left with
25 of her beads. What fraction of the red beads did Tina give away?
|
Purple |
Red |
Total |
Comparing purple beads and red 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 |
After
1x5 =
5 u7 u
3x6 =
12 uThe number of purple beads at first is repeated. Make the number of purple 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 red beads that Tina was left with
= 12 u - 5 u
= 7 u
Number of red beads that Tina gave away
= 15 u - 7 u
= 8 u
Fraction of the red beads that Tina gave away =
815 Answer(s):
815