PSLE At first, Barbara had an equal number of blue and yellow marbles . She gave away
34 of her blue marbles and some yellow marbles. In the end, she was left with
25 of her marbles. What fraction of the yellow marbles was Barbara left with?
|
Blue |
Yellow |
Total |
Comparing blue marbles and yellow marbles at first |
1x4x5 = 20 u |
1x4x5 = 20 u |
2x4x5 = 40 u |
Before |
4x5 = 20 u |
20 u |
5x8 = 40 u |
Change |
- 3x5 = - 15 u |
- 9 u |
- 2x8 = - 24 u |
After |
1x5 = 5 u |
11 u |
3x8 = 16 u |
The number of blue marbles at first is repeated. Make the number of blue marbles the first the same. LCM of 4 and 1 is 4.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 8 and 5 is 40.
Number of yellow marbles that Barbara was left with
= 16 u - 5 u
= 11 u
Fraction of the yellow marbles that Barbara was left with =
1120 Answer(s):
1120