Puzzle 5
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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Puzzle 6
How many squares of any size on this chessboard do not contain a rook?
Puzzle Copyright © Kevin Stone
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Puzzle 7
Home Improvements - Logic Puzzles
After a recent spate of home improvements, four couples were having a dinner party to discuss the additions to their houses.
Alan had not recently had a new bathroom. Kara had not yet done her kitchen, but perhaps would update it next. Brian, who is married to Maud, had not had new windows. Laura delighted in showing photographs of her new conservatory. Neither Charles nor David had a new kitchen. Julie had not had new windows. Alan, who also had not had windows, is not married to Laura and Charles is not married to Kara.
Who is married to whom, and what work had they recently undertaken, assuming that each couple had one improvement and no two couples had the same improvement.
Puzzle Copyright © Kevin Stone
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Puzzle 8
Below are ten everyday words, each of which has had some letters removed. The letters removed form either a boy's or a girl's name.
For example, if the word was PAN---IME, the answer might be PANTOMIME. Can you determine the original words?
demi----
---ple
absor---t
he---che
sc----r
----ionaire
break---ce
monog---
-----incense
s---ly
Puzzle Copyright © Kevin Stone
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