Puzzleprime Difficulty Advanced

🔥 Deduction • Advanced
Non-Transitive Dice
This is a non-transitive dice set, i.e. every dice in it is weaker than some other dice. Can you design a non-transitive set with only 3 dice?
Remark: “Weaker” means that it loses more often than it wins.
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🔥 Insight • Advanced
0 > 2, 2 > 5, 5 > 0
0 > 2, 2 > 5, 5 > 0. What is this?
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🔥 Mathematics • Advanced
Seven Sevens
Seven sevens are given. Find the other digits in this multiplication.
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🔥 Maze • Advanced
Pac-Men Maze
Find a path between the two Pacmen in this double-sided maze. You can not switch between the top and the bottom sides of the path you are traversing.
Artist: Dave Phillips
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🔥 Chess • Advanced
Mystery Mate
White plays and mates Black in one move. However, there is a mystery in this position that has to be revealed first.
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🔥 Insight • Advanced
Repetitive
You have two groups of words:
black, word, English, brief, noun, grandiloquent, last
white, number, Russian, long, verb, unpretentious, first
To which group does “repetitive” belong?
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🔥 Mathematics • Advanced
Four Points in the Plane
Find all configurations of four points in the plane, such that the pairwise distances between the points take at most two different values.
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🔥 Insight • Advanced
Twiddled Bolts
Two identical bolts are placed together so their grooves intermesh. If you move the bolts around each other as you would twiddle your thumbs, holding each bolt firmly by the head so it does not rotate and twiddling them in the direction shown below, will the heads:
(a) move inward
(b) move outward, or
(c) remain the same distance from each other?
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🔥 Insight • Advanced
Driver’s Seat
Where is the driver sitting in this car?
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🔥 Insight • Advanced
Lab Mice
A scientist has 9 bottles, exactly one of which contains poison. The poison kills any creature which drinks it within 24 hours. If the scientist has 2 lab mice at his disposal, how can he find which is the poisonous bottle within 2 days only?
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