PSLE Charlie kept his brown and blue cubes in two boxes. The ratio of the number of brown to blue cubes in the first box was 2 : 3 and it was 2 : 5 in the second box. The two boxes contained the same number of cubes. What fraction of Charlie's cubes were blue cubes?
First box |
Second box |
1x35 35 u |
1x35 35 u |
5x7 |
7x5 |
Brown |
Blue |
Brown |
Blue |
2x7 |
3x7 |
2x5 |
5x5 |
14 u |
21 u |
10 u |
25 u |
The total number of cubes in the first box and the second box is the same. Make the total number of cubes in each box the same.
LCM of 5 and 7 is 35.
Total number of blue cubes
= 21 u + 25 u
= 46 u
Total number of cubes
= 35 u + 35 u
= 70 u
Fraction of Charlie's cubes that were blue cubes
=
4670 =
2335 Answer(s):
2335