PSLE At first, Pamela had an equal number of purple and blue marbles . She gave away
23 of her purple marbles and some blue marbles. In the end, she was left with
14 of her marbles. What fraction of the blue marbles did Pamela give away?
|
Purple |
Blue |
Total |
Comparing purple marbles and blue marbles at first |
1x3x2 = 6 u |
1x3x2 = 6 u |
2x3x2 = 12 u |
Before |
3x2 = 6 u |
6 u |
4x3 = 12 u |
Change |
- 2x2 = - 4 u |
- 5 u |
- 1x3 = - 9 u |
After |
1x2 = 2 u |
1 u |
3x3 = 3 u |
After
1x2 =
2 u1 u
3x3 =
3 uThe number of purple marbles at first is repeated. Make the number of purple 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 4 is 12.
Number of blue marbles that Pamela was left with
= 3 u - 2 u
= 1 u
Number of blue marbles that Pamela gave away
= 6 u - 1 u
= 5 u
Fraction of the blue marbles that Pamela gave away =
56 Answer(s):
56