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> Just Math> Science> Algorithms
Given a reference triangle △ABC, a reflection triangle △A′B′C′ is generated by reflecting each vertex about the opposite side, for example A′ is generated by reflecting vertex A about side BC. Now, suppose the vertices A′, B′ and C′ are given, how can you find the original vertices of the original triangle △ABC?
(No Solution Yet, 0 Comments) Submitted on 2020-01-24 by Danish Ahmed Khan   
Difficulty: 4 of 5 Bonus: A quotient and square problem (in Numbers) Rating: 3.00
Determine all primes m for which the quotient (2m-1 - 1)/m is a perfect square.
(Solution Posted, 5 Comments) Submitted on 2006-09-23 by K Sengupta   
Difficulty: 3 of 5Certain old trade (in General)
Posted on 2020-01-22 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Set-Free (in Logic) Rating: 2.00
Posted on 2020-01-20 by Charlie (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Quadrootles (in Numbers)
Posted on 2020-01-17 by JLo (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Find the Holes (in Logic)
Posted on 2020-01-15 by Charlie (Solution Posted, 1 Comments)
Difficulty: 1 of 5PYHIYP #2 (in Just Math) Rating: 5.00
Posted on 2020-01-13 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 53 circles in an isosceles trapezoid (in Geometry)
Posted on 2020-01-10 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Equal angles within a right triangle (in Geometry)
Posted on 2020-01-08 by Jer (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Numbered Balls in Test Tubes (in Logic)
Posted on 2020-01-06 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Two players, three pots (in Games) Rating: 3.00
Posted on 2020-01-03 by Brian Smith (Solution Posted, 4 Comments)
Difficulty: 3 of 5Phrase and misconception (in Cryptography) Rating: 2.00
Posted on 2020-01-01 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Maximal Rectangle (in Shapes)
Posted on 2019-12-30 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Heptagonal Triangle (in Shapes)
Posted on 2019-12-27 by Danish Ahmed Khan (No Solution Yet, 4 Comments)
Difficulty: 4 of 513 L2L (in Word Problems)
Posted on 2019-12-25 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5Three Squares make a Triangle (in Shapes)
Posted on 2019-12-23 by Larry (No Solution Yet, 3 Comments)

Recently Posted Solutions:
Difficulty: 2 of 5Find the Holes (in Logic)
Submitted By Charlie. Solution posted on 2020-01-20 15:21:10
Difficulty: 2 of 5Insert 2 missing numbers (in Sequences)
Submitted By Ady TZIDON. Solution posted on 2020-01-17 13:35:25
Difficulty: 1 of 5PYHIYP #2 (in Just Math)
Submitted By Ady TZIDON. Solution posted on 2020-01-15 21:29:32
Difficulty: 4 of 5Peace, no war (in General)
Submitted By Ady TZIDON. Solution posted on 2020-01-12 16:29:32
Difficulty: 3 of 5One puzzle, three hints (in General)
Submitted By Ady TZIDON. Solution posted on 2020-01-12 02:35:19
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