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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: 2 of 5 Latest: Performance Probe (in Logic)
Four friends Abe, Ben, Cade and Dan sang a quartet. Two of them sang tenor, one sang baritone and one sang bass, not necessarily in that order.

It is also known that:

(i) If Ben was not one of the tenors, then Abe was the baritone.
(ii) If Dan was the baritone, then Cade was the bass.

Determine the probability that:

(a) Ben was a tenor.
(b) Abe was the baritone.
(c) Cade was the bass.

(No Solution Yet, 0 Comments) Submitted on 2014-10-24 by K Sengupta   
Difficulty: 3 of 5 Bonus: Four Fours Fancy Formula! (in Just Math) Rating: 2.29
Find x if √(4+√(4-√(4+√(4-x))))=x.
(Solution Posted, 6 Comments) Submitted on 2004-12-24 by Old Original Oskar!   
Difficulty: 3 of 5Curious concatenations (in Numbers)
Posted on 2014-10-23 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Extending tic-tac-toe (in Just Math)
Posted on 2014-10-23 by Ady TZIDON (No Solution Yet, 6 Comments)
Difficulty: 4 of 5 Beaujolais Nouveau Day (in Probability) Rating: 4.00
Posted on 2014-10-22 by Ady TZIDON (No Solution Yet, 7 Comments)
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)

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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