A farmer has hens and cows. Together they have 35 heads and 98 legs. How many cows are there?
- A.12
- B.14 ✓
- C.16
- D.18
Explanation: If all 35 were hens, there'd be 70 legs — 28 short. Each cow instead of a hen adds 2 legs, so cows = 28÷2 = 14.
Class 6 IMO Mathematics Olympiad practice · Olympiad Thinking · Working Backwards & Problem-Solving Strategies
← All Working Backwards & Problem-Solving Strategies questions