Puzzle 697
What is the minimum number of queens required on a chessboard such that all squares are attacked?
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Hint
Try this with a real board.
Answer
5 queens are required.
Puzzle 698
If four kittens can catch four toys in four minutes …
… how many toys can twelve kittens catch in twelve minutes?
Puzzle Copyright © Kevin Stone
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Hint
How many toys can one kitten catch in twelve minutes?
Answer
36 toys.
Reasoning
Four kittens can catch four toys in four minutes,
so, one kitten can catch one toy in four minutes,
so, one kitten can catch three toys in twelve minutes,
so, twelve kittens can catch 36 toys in twelve minutes.
Puzzle 699
Below you will find ten common 6-letter words, however, every other letter is missing.
Can you determine the original words?
-s-e-d
-p-a-g
-r-f-r
-y-r-d
-r-f-e
-a-b-n
-a-e-a
-o-d-g
-s-f-l
-i-s-e
Puzzle Copyright © Kevin Stone
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Hint
The first word begins with the letter A.
Answers
-s-e-d = ascend
-p-a-g = sprang
-r-f-r = prefer
-y-r-d = hybrid
-r-f-e = trifle
-a-b-n = carbon
-a-e-a = camera
-o-d-g = hotdog
-s-f-l = useful
-i-s-e = tissue
