PSLE At first, Hilda had an equal number of black and green marbles . She gave away
25 of her black marbles and some green marbles. In the end, she was left with
35 of her marbles. What fraction of the green marbles was Hilda left with?
|
Black |
Green |
Total |
Comparing black marbles and green marbles at first |
1x5x1 = 5 u |
1x5x1 = 5 u |
2x5x1 = 10 u |
Before |
5x1 = 5 u |
5 u |
5x2 = 10 u |
Change |
- 2x1 = - 2 u |
- 2 u |
- 3x2 = - 4 u |
After |
3x1 = 3 u |
3 u |
2x2 = 6 u |
The number of black marbles at first is repeated. Make the number of black marbles the first the same. LCM of 5 and 1 is 5.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 10 and 5 is 10.
Number of green marbles that Hilda was left with
= 6 u - 3 u
= 3 u
Fraction of the green marbles that Hilda was left with =
35 Answer(s):
35