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pretorik 
 
161 
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markr 
 
116 
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Gordon Weir 
 
104 
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mbloomfi 
 
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 
 
236 
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alan, De_Bill 
 
231 
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dddfff 
 
228 
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kavfy 
 
221 
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idler_ 
 
106 
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akajobe 
 
94 
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tolstyi 
 
56 
8. 
STARuK 
 
42 
9. 
vale 
 
31 
10. 
xandr 
 
11 





Place numbers 1,2,.., 9 without repetitions into a 3x3 square so that
the sums in all rows, columns, and diagonals are all equal. 


Puzzle statistics "Numbers in a square".
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A Megamind on his treasure hunt discovered a cave with six ancient
vases. Unfortunately, instead of treasures, the vases contained
beads. The first vase had 60 beads, the second had 30 beads, the third
had 20 beads, and the fourth had 15 beads. How many beads were in the
fifth and the sixth vases, given that these number form a certain
pattern? 


Puzzle statistics "Vases and beads".
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One more opening 
Chess puzzles 

Weight: 3 

Liked the puzzle: 100% 

24.12.2011 

Starting from the initial possition White and Black have done 4 moves each. What are these moves? Picture. 


Puzzle statistics "One more opening".
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Flying deep underwater 
Riddles, jokes 

Weight: 0 

Liked the puzzle: 33% 

02.04.2011 

What flies 500 meters below the sea level? 


Puzzle statistics "Flying deep underwater".
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Links and chains 
Logic puzzles 

Weight: 1 

Liked the puzzle: 100% 

02.04.2011 

Once upon a time, a Megamind worked as a smith. He was brought 5
chains each consisting of 3 links. What is the minimal number of links
that the Megamind should relock to make one long chain? 


Puzzle statistics "Links and chains".
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Divide a parallelogram 
Geometry puzzles 

Weight: 5 

Liked the puzzle: 100% 

02.04.2011 

How to divide a parallelogram into 9 isosceles triangles? 


Puzzle statistics "Divide a parallelogram".
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Indeterminate color 
Riddles, jokes 

Weight: 1 

Liked the puzzle: 50% 

19.03.2011 

A certain subject caught the attention of a walking couple. They
started to argue. He said: It's red.
She said: No, it's black. He shot back: Yeah? Then why is it white? She
replied: Because it's green, silly.
What are they arguing about? 


Puzzle statistics "Indeterminate color".
Last updated 6328977.1 minutes ago.

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1


A Megamind was doing his laundry. The washer's manual says that a
standard load of detergent is 220 g. The Megamind has
a bag of dry detergent containing exactly 1 kg, the balance scale, and
four weights: 2x10 g and 2x5 g. How can the Megamind
obtain exactly 220 grams of detergent using at most three weighings? 


Puzzle statistics "Laundry".
Last updated 6328977.1 minutes ago.

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1


Prove that the sum of all divisors of a nonzero square integer is odd. 


Puzzle statistics "Sum of all divisors of a square".
Last updated 6328977.1 minutes ago.

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A house has four walls each facing South. Each wall has a window. A bear is seen in a window. What color is the bear? 


Puzzle statistics "A bear in a window".
Last updated 6328977.1 minutes ago.

Solved by: 21
Daily average: 0
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Viewed by: 35
Fraction solved by: 60%
Solved at first attempt: 90.4%
Average discussion length: 1.0
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2


