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pretorik 
 
161 
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markr 
 
116 
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Gordon Weir 
 
104 
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97 
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Dennis Nazarov 
 
96 
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zzz123 
 
72 
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Srikanta 
 
56 
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lidSpelunker 
 
53 
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SAMIH FAHMY 
 
48 
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jkr 
 
44 




1. 
denisR, mishik 
 
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106 
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akajobe 
 
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tolstyi 
 
56 
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STARuK 
 
42 
9. 
vale 
 
31 
10. 
xandr 
 
11 





A certain type of bacteria double every second. If we put one bacterium in a Petri dish, the dish will fill in 1 minute. How long will it take to fill the dish, if we start with 2 bacteria? 


Puzzle statistics "Bacterium".
Last updated 6691329.8 minutes ago.

Solved by: 121
Daily average: 0.02
Answers submitted: 130
Viewed by: 297
Fraction solved by: 40.7%
Solved at first attempt: 99.1%
Average discussion length: 1.0
Liked the puzzle: 21
Did not like the puzzle:
2

Two incense sticks 
Logic puzzles 

Weight: 1 

Liked the puzzle: 100% 

27.12.2009 

You have two incense sticks, that burn unevenly, and a lighter. Each
will burn for an hour. How can you time 45 minutes using nothing but
these tools. 


Puzzle statistics "Two incense sticks".
Last updated 6691329.8 minutes ago.

Solved by: 41
Daily average: 0
Answers submitted: 53
Viewed by: 296
Fraction solved by: 13.8%
Solved at first attempt: 92.6%
Average discussion length: 1.1
Liked the puzzle: 11
Did not like the puzzle:
0


A Megamind owns a mint with a 100 workers. Each day, he gives 1kg of
gold to each worker, and each worker must make 100 coins (10 grams
each). The Megamind learnt that one nof the workers is a forger, he
makes coins that are 1g lighter. How can Megamind determine the forger
using only one weighing? The scales can determine the total weight, up
to 100 kg. 


Puzzle statistics "A forger".
Last updated 6691329.8 minutes ago.

Solved by: 31
Daily average: 0
Answers submitted: 31
Viewed by: 296
Fraction solved by: 10.4%
Solved at first attempt: 96.7%
Average discussion length: 1.0
Liked the puzzle: 7
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1


A Megamind has two coins that are jointly worth 15 cents. One coin is
not a nickel. What are these coins?



Puzzle statistics "Two coins".
Last updated 6691329.8 minutes ago.

Solved by: 67
Daily average: 0.01
Answers submitted: 68
Viewed by: 295
Fraction solved by: 22.7%
Solved at first attempt: 98.5%
Average discussion length: 1.0
Liked the puzzle: 11
Did not like the puzzle:
2


You have 8 coins that appear to be identical, except one (which is
counterfeit) is slightly heavier than the others. What is the
minimal number of weighings on the balance scale that is required to
find the counterfeit coin? 


Puzzle statistics "8 coins".
Last updated 6691329.8 minutes ago.

Solved by: 48
Daily average: 0
Answers submitted: 89
Viewed by: 295
Fraction solved by: 16.2%
Solved at first attempt: 72.9%
Average discussion length: 1.8
Liked the puzzle: 10
Did not like the puzzle:
0


A Megamind has two bags and 100 M&Ms. He needs to put all the candies
into the bags so that one bag has twice as many
M&Ms as the other. He cannot split the M&Ms. What should the Megamind do? 


Puzzle statistics "A 100 M&Ms".
Last updated 6691329.8 minutes ago.

Solved by: 49
Daily average: 0
Answers submitted: 64
Viewed by: 295
Fraction solved by: 16.6%
Solved at first attempt: 89.7%
Average discussion length: 1.2
Liked the puzzle: 10
Did not like the puzzle:
0


There is true expression on panel. But only one pixel is defective. Which one?



Puzzle statistics "Defective pixel".
Last updated 6691329.8 minutes ago.

Solved by: 94
Daily average: 0.01
Answers submitted: 129
Viewed by: 294
Fraction solved by: 31.9%
Solved at first attempt: 94.6%
Average discussion length: 1.2
Liked the puzzle: 25
Did not like the puzzle:
0


Florida  n, New York  r, Texas  n, Washington  ? 


Puzzle statistics "States and characters".
Last updated 6691329.8 minutes ago.

Solved by: 18
Daily average: 0
Answers submitted: 22
Viewed by: 276
Fraction solved by: 6.5%
Solved at first attempt: 100%
Average discussion length: 1.0
Liked the puzzle: 1
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0


Can you describe five consecutive days without referring to weekdays or
days of the month? 


Puzzle statistics "Five days".
Last updated 6691329.8 minutes ago.

Solved by: 25
Daily average: 0
Answers submitted: 30
Viewed by: 259
Fraction solved by: 9.6%
Solved at first attempt: 80%
Average discussion length: 1.5
Liked the puzzle: 6
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1


A row of six glasses is on a table. Three full glasses are followed by
three empty glasses. Is it possible to make these glasses alternate:
full,empty full, etc by touching only one glass? 


Puzzle statistics "Six glasses".
Last updated 6691329.8 minutes ago.

Solved by: 50
Daily average: 0.01
Answers submitted: 52
Viewed by: 259
Fraction solved by: 19.3%
Solved at first attempt: 92%
Average discussion length: 1.1
Liked the puzzle: 10
Did not like the puzzle:
0

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