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Puzzles
River Crossing
Solve classic river crossing logic puzzles that test constraints and step planning.
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Session Progress
For n parcels, one-way movements = 2n - 1 = 13.
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Q2. A ferry carries 5 people per crossing. 19 people must cross one-way. Minimum crossings?
Minimum one-way crossings = ceil(19/5) = 4.
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Q3. A ferry carries 3 people per crossing. 25 people must cross one-way. Minimum crossings?
Minimum one-way crossings = ceil(25/3) = 9.
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Q4. A ferry carries 2 sacks per crossing. 20 sacks must cross one-way. Minimum crossings?
Minimum one-way crossings = ceil(20/2) = 10.
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Q5. A boatman moves 8 parcels across, carrying one parcel outbound and returning empty except after the final trip. Total one-way movements?
For n parcels, one-way movements = 2n - 1 = 15.
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Q6. Classic puzzle: A farmer must move a wolf, goat, and cabbage across a river. Boat carries farmer plus one item. Minimum one-way trips?
The optimal sequence for wolf-goat-cabbage needs 7 one-way crossings.
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Q7. A boatman moves 12 parcels across, carrying one parcel outbound and returning empty except after the final trip. Total one-way movements?
For n parcels, one-way movements = 2n - 1 = 23.
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Q8. A boatman moves 3 parcels across, carrying one parcel outbound and returning empty except after the final trip. Total one-way movements?
For n parcels, one-way movements = 2n - 1 = 5.
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Q9. A boatman moves 5 parcels across, carrying one parcel outbound and returning empty except after the final trip. Total one-way movements?
For n parcels, one-way movements = 2n - 1 = 9.
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Q10. A boatman moves 10 parcels across, carrying one parcel outbound and returning empty except after the final trip. Total one-way movements?
For n parcels, one-way movements = 2n - 1 = 19.
Quiz Summary
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River Crossing Puzzle Questions with Solutions
Train your logic and pattern-recognition using timed river crossing puzzle quizzes. Solve one question at a time, get instant correctness feedback, and learn with clear answer explanations.
How can I improve in puzzle-solving speed?
Use timed rounds regularly, identify repeat patterns, and review explanation steps after every attempt.
Are puzzle quizzes useful for aptitude interviews?
Yes. Puzzle rounds are common in assessment tests and help evaluate logical thinking and problem-solving.