A jar has red and blue marbles in the ratio 3:5. If there are 24 red marbles, how many blue marbles are there?
- A.32
- B.36
- C.40 ✓
- D.45
Explanation: Each 'part' = 24÷3=8 marbles. Blue = 5 parts = 5×8=40.
Class 6 IMO Mathematics Olympiad practice · Olympiad Thinking · Working Backwards & Problem-Solving Strategies
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