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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: 3 of 5 Random: Different Digits (in Numbers) Rating: 3.29
Different letters represent different numbers and none of them is equal to zero.

  NOSIER
+ ASTRAL
  725613
What word does the final result represent ?
(Solution Posted, 14 Comments) Submitted on 2003-12-28 by Ravi Raja   
Difficulty: 3 of 5 Bonus: The Giant Marble (in Science) Rating: 4.00
A large block of Aluminum has a perfect cylindrical hole of diameter 3 meters. On top of the hole sits a perfect, solid glass sphere of diameter 3.05 meters. Your job is to get the glass sphere to traverse the hole in the block. Oh yeah, when you are done, the block and sphere are indistinguishable (macroscopically and microscopically) from their condition before you started. Is this possible?
(Solution Posted, 4 Comments) Submitted on 2006-12-28 by Kenny M   
Difficulty: 2 of 5Constrained circle in quadrilateral (in Just Math)
Posted on 2021-04-09 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 1 of 5Euphony (in Logic) Rating: 3.00
Posted on 2021-04-08 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Pandigital powers (in Numbers) Rating: 5.00
Posted on 2021-04-07 by Math Man (No Solution Yet, 5 Comments)
Difficulty: 3 of 5quadratic ^ quadratic (in General) Rating: 3.00
Posted on 2021-04-06 by Larry (Solution Posted, 3 Comments)
Difficulty: 3 of 5Nearsighted rooks on a large chessboard (in Just Math) Rating: 3.00
Posted on 2021-04-05 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Quadratic inequality leading to sum of roots (in Just Math)
Posted on 2021-04-02 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Knight tour in an infinite board (in Just Math)
Posted on 2021-04-01 by Danish Ahmed Khan (No Solution Yet, 2 Comments)
Difficulty: 3 of 57.1.4 , my friend (in Numbers) Rating: 5.00
Posted on 2021-03-31 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Square Deal (in Word Problems) Rating: 4.00
Posted on 2021-03-30 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5Only in USA (in General) Rating: 5.00
Posted on 2021-03-29 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Max angle in triangle (in Geometry)
Posted on 2021-03-26 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Routes' routine (in Logic) Rating: 4.00
Posted on 2021-03-25 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Don't walk! (in General) Rating: 4.00
Posted on 2021-03-24 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 2 of 5Permuted quadratic equation (in Just Math)
Posted on 2021-03-23 by Danish Ahmed Khan (No Solution Yet, 1 Comments)
Difficulty: 2 of 5With or without (in Numbers) Rating: 4.50
Posted on 2021-03-22 by Ady TZIDON (No Solution Yet, 5 Comments)

Recently Posted Solutions:
Difficulty: 3 of 5quadratic ^ quadratic (in General)
Submitted By Larry. Solution posted on 2021-04-06 18:17:40
Difficulty: 2 of 5Square Deal (in Word Problems)
Submitted By Charlie. Solution posted on 2021-04-01 10:25:06
Difficulty: 3 of 5Beat The Book (in Probability)
Submitted By tomarken. Solution posted on 2021-03-19 07:43:33
Difficulty: 3 of 5Complex Roots Magnitude (in Just Math)
Submitted By Brian Smith. Solution posted on 2021-03-04 23:19:09
Difficulty: 3 of 5The class of ‘55’ (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2021-02-28 01:55:58
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