PSLE A bag contains beads of three different colours.
13 of the beads are blue. The ratio of the number of red beads to that of orange beads is 1 : 4. What is the ratio of the number of red beads to that of blue beads?
Blue |
Red |
Orange |
Total |
1x5 |
2x5 |
3x5 |
|
1x2 |
4x2 |
|
5 u |
2 u |
8 u |
15 u |
The total number of orange and red beads is the combined repeated identity.
Make the total number orange and red beads the same.
LCM of 2 and 5 = 10
Red : Blue
2 : 5
Answer(s): 2 : 5