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Welcome to perplexus.info, flooble's perplexing puzzle portal. Here, we collect all sorts of puzzles, from simple logic questions and word tricks to in-depth math problems like probability and geometry. Click around and see if your brain is up to the task! If you're new here, make sure you sign up so that you can leave comments and submit your own problems!
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Difficulty: 4 of 5 Latest: Beaujolais Nouveau Day (in Probability) Rating: 4.00
Under French law, the Beaujolais Nouveau ( wine ) is released at 12:01 A.M. on the third Thursday in November every year.

Last year, prior to the above date 11 wine amateurs deposited 12 small-size barrels at their merchant’s store (A,B,C,D,E,F,G - 7 liters each; S,T,U - 5 liters each and V two barrels: one 7 liters and one 5 liters).

When the wine arrived 70 liters were poured in the above barrels so that each barrel got an integer number of liters. The Customers were billed accordingly.

If every possible distribution of wine among the 12 barrels is equally likely, what is the possibility that V(ictor) had to pay for 11 liters of wine?

(No Solution Yet, 7 Comments) Submitted on 2014-10-22 by Ady TZIDON   
Difficulty: 4 of 5 Bonus: Perpendicular Area (in Geometry) Rating: 3.75
The altitude from one of the vertices of an acute-angled triangle ABC meets the opposite side at D. From D, perpendiculars DE and DF are drawn to the other two sides. Prove that the length EF is the same whichever vertex is chosen.

For extra credit: if a=|BC|, b=|CA|, c=|AB|, and d=|EF|, show that Area(ABC)=½√(abcd).

2002 British Mathematical Olympiad, Round 2, Problem 1.
(Solution Posted, 2 Comments) Submitted on 2005-12-08 by Bractals   
Difficulty: 1 of 5One by two (in Numbers)
Posted on 2014-10-22 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Distinct Decimal Digits (in Numbers)
Posted on 2014-10-21 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Farmer Giles (in Just Math)
Posted on 2014-10-21 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Cuisine Conclusion II (in Word Problems) Rating: 5.00
Posted on 2014-10-20 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Switch Settlement (in Logic)
Posted on 2014-10-20 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Geometric, Arithmetic and Harmonic Harness (in Sequences) Rating: 3.00
Posted on 2014-10-19 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Cot Ratio Conclusion (in Just Math)
Posted on 2014-10-18 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Conic Triangle (in Geometry)
Posted on 2014-10-17 by Bractals (Solution Posted, 3 Comments)
Difficulty: 2 of 5What is missing? (in Sequences)
Posted on 2014-10-17 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Half odd, half even (in Numbers)
Posted on 2014-10-16 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Distinct Values Validation (in Just Math)
Posted on 2014-10-16 by K Sengupta (No Solution Yet, 7 Comments)
Difficulty: 3 of 5Reverse Role (in Just Math) Rating: 3.00
Posted on 2014-10-15 by K Sengupta (No Solution Yet, 4 Comments)
Difficulty: 3 of 5My products (in General)
Posted on 2014-10-15 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Ternary Sum Travail (in Probability)
Posted on 2014-10-14 by K Sengupta (No Solution Yet, 2 Comments)

Recently Posted Solutions:
Difficulty: 3 of 5Conic Triangle (in Geometry)
Submitted By Bractals. Solution posted on 2014-10-18 11:08:54
Difficulty: 3 of 5Guessing ages (in Tricks)
Submitted By Ady TZIDON. Solution posted on 2014-10-15 11:07:24
Difficulty: 3 of 5Circles at a point. (in Geometry)
Submitted By broll. Solution posted on 2014-10-14 07:40:35
Difficulty: 3 of 5Next word, please (in Sequences)
Submitted By Ady TZIDON. Solution posted on 2014-10-12 22:44:24
Difficulty: 2 of 5Only one basic solution II (in General)
Submitted By Ady TZIDON. Solution posted on 2014-10-12 22:03:02
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