If 3 pens cost ₹45, what is the ratio of the cost of 1 pen to the cost of 5 pens?
- A.1:3
- B.1:4
- C.1:5 ✓
- D.1:6
Explanation: 1 pen costs ₹15, and 5 pens cost ₹75. The ratio 15:75 simplifies to 1:5.
Class 6 IMO Mathematics Olympiad practice · Arithmetic · Ratio, Proportion & Percentages
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