
1. 
pretorik 
 
161 
2. 
markr 
 
116 
3. 
Gordon Weir 
 
104 
4. 
mbloomfi 
 
97 
5. 
Dennis Nazarov 
 
96 
6. 
zzz123 
 
72 
7. 
Srikanta 
 
56 
8. 
lidSpelunker 
 
53 
9. 
SAMIH FAHMY 
 
48 
10. 
jkr 
 
44 




1. 
denisR, mishik 
 
236 
2. 
alan, De_Bill 
 
231 
3. 
dddfff 
 
228 
4. 
kavfy 
 
221 
5. 
idler_ 
 
106 
6. 
akajobe 
 
94 
7. 
tolstyi 
 
56 
8. 
STARuK 
 
42 
9. 
vale 
 
31 
10. 
xandr 
 
11 





A Megamind is lost in the mountains. He is standing on a path,
shouting for help.
Finally, he sees a local approaching. Megamind knows that the locals
can be knights that always tell the truth, or knaves that always lie.
He also knows that the path leads to the village of knights in one
direction and to the village of knaves in the other. The problems is
that the knaves are also hateful of Megaminds, and will stone him if
gets to their village. How can Megamind ask one question and determine
the right way to go? 


Puzzle statistics "Two villages".
Last updated 6878990.9 minutes ago.

Solved by: 37
Daily average: 0
Answers submitted: 47
Viewed by: 296
Fraction solved by: 12.5%
Solved at first attempt: 83.7%
Average discussion length: 1.4
Liked the puzzle: 11
Did not like the puzzle:
0


After a shipwreck, a MegaMind found himself on an island where some natives always lie and some always tell the truth. As a ritual, all natives stood in a circle facing the center, joined their hands and everybody told the MegaMind whether his right hand side neighbor is a liar or a truthteller. Based on this information, the MegaMind was able to determine the exact percentage of natives that tell the truth.
Can you also determine this percentage? 


Puzzle statistics "A circle of lies".
Last updated 6878990.9 minutes ago.

Solved by: 9
Daily average: 0
Answers submitted: 10
Viewed by: 284
Fraction solved by: 3.1%
Solved at first attempt: 77.7%
Average discussion length: 1.8
Liked the puzzle: 2
Did not like the puzzle:
0


A MegaMind was captured and brought to an island where a 1000 natives live. Some natives always tell the truth and some always lie. There is at least one truth teller on the island. The MegaMind was promised to be kept alive if he can point out the liars from the truthtellers. Every hour, the MegaMind is allowed to call up a number of natives and ask a single question: "How many of you are truthtellers?" or "How many of you are the liars?" How many hours does the MegaMind need before he can determine the liars/truthtellers? 


Puzzle statistics "A thousand natives".
Last updated 6878990.9 minutes ago.

Solved by: 5
Daily average: 0
Answers submitted: 5
Viewed by: 295
Fraction solved by: 1.6%
Solved at first attempt: 80%
Average discussion length: 1.4
Liked the puzzle: 3
Did not like the puzzle:
0


You are standing at the road fork. One of the two roads leads to your
destination, but you don't know which one. Fortunately, there is a
sentry guarding the intersection. Unfortunately, the sentry can be a
knight or a knave, moreover, he is a foreigner. He understands you,
but when he responds, he says "uhh" or "err" meaning "yes" or "no",
but you don't know what means what. He does not say anything else, and
he is standing at attention, not being able to point in the right
direction. On top of all this, the sentry is somewhat dumb, i.e. he
cannot understand sentences longer than 13 words. You may ask a single
question to figure out which way to go. Which question should you ask? 


Puzzle statistics "A foreign sentry".
Last updated 6878990.9 minutes ago.

Solved by: 6
Daily average: 0
Answers submitted: 8
Viewed by: 293
Fraction solved by: 2%
Solved at first attempt: 100%
Average discussion length: 1.0
Liked the puzzle: 3
Did not like the puzzle:
0


