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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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An ellipse passes through the points (0,-1), (2,0), (-2,2) and encloses minimum possible area. Find the equation of the ellipse.
(No Solution Yet, 1 Comments) Submitted on 2019-09-20 by Danish Ahmed Khan   
Difficulty: 2 of 5 Bonus: Evil character (in Word Problems) Rating: 3.00
You are given the word EVIL and the numbers 2, 3, 4, and 5. You are to take each number and change a letter in EVIL for the one that number of places forward or backward in the alphabet: for example, you can replace E with the letter 2 places later (G) or earlier (C) in the alphabet, or 3 places later or earlier, or 4 places later or earlier, etc. Use each number once and each letter once. You can "wrap around" the alphabet: consider the letter after Z to be A, and the letter before A to be Z. When done correctly, you will find the name of a Shakespearean character who was, appropriately enough, very evil. Who is this character?
(No Solution Yet, 4 Comments) Submitted on 2006-09-11 by bookworm   
Difficulty: 3 of 5Area of central locus (in Shapes)
Posted on 2019-09-19 by Danish Ahmed Khan (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Locate the Locus (in Shapes)
Posted on 2019-09-18 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 1 of 5Just substitute? (in Numbers) Rating: 5.00
Posted on 2019-09-17 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Twin Words (in Word Problems)
Posted on 2019-09-16 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 3 of 5The Five Touching Spheres 2 (in Shapes)
Posted on 2019-09-15 by Brian Smith (Solution Posted, 3 Comments)
Difficulty: 2 of 5A's, B's, C's and D's 3 (in Logic)
Posted on 2019-09-14 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Spherical displacement of water (in Shapes)
Posted on 2019-09-13 by Danish Ahmed Khan (No Solution Yet, 5 Comments)
Difficulty: 4 of 5Hexagonal Spider Web (in Probability)
Posted on 2019-09-12 by Danish Ahmed Khan (No Solution Yet, 7 Comments)
Difficulty: 3 of 5A matter of perspective (in Shapes)
Posted on 2019-09-11 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Jeopardy style IV (in Word Problems)
Posted on 2019-09-10 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 5One way out (in Just Math)
Posted on 2019-09-09 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 3 of 55 circles in a square part 2 (in Geometry)
Posted on 2019-09-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 4 of 5Inellipse (in Shapes)
Posted on 2019-09-07 by Danish Ahmed Khan (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Reduced to single digit (in Numbers)
Posted on 2019-09-06 by Danish Ahmed Khan (No Solution Yet, 14 Comments)

Recently Posted Solutions:
Difficulty: 1 of 5Composite prime (in Numbers)
Submitted By Math Man. Solution posted on 2019-09-21 12:26:34
Difficulty: 3 of 5The Five Touching Spheres 2 (in Shapes)
Submitted By Brian Smith. Solution posted on 2019-09-19 00:46:43
Difficulty: 3 of 5Do not say ONE (in Games)
Submitted By Ady TZIDON. Solution posted on 2019-09-17 10:11:55
Difficulty: 2 of 5Jeopardy-style A&Q (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2019-09-07 03:01:27
Difficulty: 3 of 5Unique letters (in Word Problems)
Submitted By Ady TZIDON. Solution posted on 2019-08-15 04:19:29
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