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> Logic (1)> Probability> Shapes> General
> Numbers (2)> Games> Paradoxes> Riddles
> Just Math (1)> Science> Algorithms

  
A bag contains 3 red, 4 white, and 5 blue balls. Two balls of different
color are removed from the bag and replaced with two balls of the third color.

Prove that no matter how many times this procedure is repeated, it is impossible for all twelve balls in the bag to be the same color.
  
(Solution Posted, 3 Comments) Submitted on 2015-07-29 by Bractals   
Difficulty: 3 of 5 Bonus: logs and sins (in Just Math) Rating: 2.25
sin(x) = lg(x)

Give all values for x.

(Solution Posted, 9 Comments) Submitted on 2002-06-24 by Dulanjana   
Difficulty: 2 of 5Perfect Power Puzzle (in Just Math)
Posted on 2015-07-29 by K Sengupta (No Solution Yet, 5 Comments)
Difficulty: 3 of 5You make me laugh (in Numbers)
Posted on 2015-07-28 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Pythagorean triplet generator (in Numbers)
Posted on 2015-07-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No letters (in Cryptography)
Posted on 2015-07-27 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Digit Reversal Puzzle (in Just Math)
Posted on 2015-07-27 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Integer Triangle Side Puzzle (in Shapes)
Posted on 2015-07-26 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Linear and Quadratic Sum Puzzle (in Just Math)
Posted on 2015-07-25 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Matching pairs (in Numbers) Rating: 5.00
Posted on 2015-07-24 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 2 of 5xyz inequality (in Just Math)
Posted on 2015-07-24 by Bractals (Solution Posted, 1 Comments)
Difficulty: 3 of 5What's in a name? (in Word Problems)
Posted on 2015-07-23 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Nine trolls (in Just Math) Rating: 4.00
Posted on 2015-07-23 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5One of the countries (in Word Problems)
Posted on 2015-07-22 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Yearly Division (in Just Math)
Posted on 2015-07-22 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Initial Term Identification (in Sequences)
Posted on 2015-07-21 by K Sengupta (No Solution Yet, 3 Comments)

Recently Posted Solutions:
Difficulty: 3 of 5Red, White, and Blue (in Logic)
Submitted By Bractals. Solution posted on 2015-07-29 18:44:09
Difficulty: 3 of 5Matching pairs (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2015-07-29 05:41:51
Difficulty: 2 of 5xyz inequality (in Just Math)
Submitted By Bractals. Solution posted on 2015-07-24 12:23:55
Difficulty: 3 of 5Past persons (in Word Problems)
Submitted By Ady TZIDON. Solution posted on 2015-07-08 00:43:59
Difficulty: 4 of 57 idiomatic phrases (in Word Problems)
Submitted By Ady TZIDON. Solution posted on 2015-07-05 10:04:33
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