Puzzle 833
If one small rabbit can dig a warren in nine hours, a medium rabbit can dig a warren in 6 hours, and a large rabbit can dig a warren in four and a half hours.
How long will it take one small, one medium, and one large rabbit, to dig a warren if they all work together?
Puzzle Copyright © Kevin Stone
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Hint
How much of a warren can each rabbit dig in one hour?
Answer
2 hours.
Reasoning
The small rabbit can dig a warren in nine hours, so digs 1 /9 in one hour.
The medium rabbit can dig a warren in 6 hours, so digs 1 /6 in one hour.
The large rabbit can dig a warren in four and a half hours, so digs 1 /4.5 in one hour.
1 Hour = 1 /9 + 1 /6 + 1 /4.5
To make the denominators all the same, we can multiply through by 18 /18 to give:
1 Hour = 2 /18 + 3 /18 + 4 /18
1 Hour = 9 /18
1 Hour = 1 /2
So in one hour, they have dug half a warren, the whole warren will therefore take 2 hours.
Puzzle 834
Can you guess what the following abbreviations mean
COM DRA ADV ACT SPO MUS HOR SCI
Puzzle Copyright © Alan Stillson Website: www.stillsonworks.com
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Answer
Movie types: comedy, drama, adventure, action, sports, musicals, horror, science fiction.
Puzzle 835
How many common five letter words can you make from the following letters, using all the letters in each word?
AELST
Puzzle Copyright © Kevin Stone
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Hint
There are quite a few anagrams, one of which is LEAST.
Answer
Least, slate, stale, steal, tales, teals.
Remember that the question asked for common words.
Puzzle 836
How far can …
… a horse run into a forest?
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Hint
Some might argue that this isn't a puzzle.
Answer
Half way, after which it would be running out!
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