PSLE At first, Fiona had an equal number of pink and red marbles . She gave away
23 of her pink marbles and some red marbles. In the end, she was left with
25 of her marbles. What fraction of the red marbles was Fiona left with?
|
Pink |
Red |
Total |
Comparing pink marbles and red marbles 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 marbles at first is repeated. Make the number of pink marbles the first the same. LCM of 3 and 1 is 3.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 6 and 5 is 30.
Number of red marbles that Fiona was left with
= 12 u - 5 u
= 7 u
Fraction of the red marbles that Fiona was left with =
715 Answer(s):
715