**Math Equation Riddle - 9 May**

Find the mistake in the below maths equations

A = 2

A(A-1) = 2(A-1)

A2-A = 2A-2

A2-2A = A-2

A(A-2) = A-2

A = 1

**For Solution :**Click Here

This Blog is a collection of brain teasers, puzzles (maths,fun,brain etc), riddles,Questions, Quiz.

Find the mistake in the below maths equations

A = 2

A(A-1) = 2(A-1)

A2-A = 2A-2

A2-2A = A-2

A(A-2) = A-2

A = 1

Subscribe to:
Post Comments (Atom)

Difficulty Level 3/5
(803)
Logic Puzzles
(534)
Difficulty Level 4/5
(532)
Picture Puzzles
(384)
Maths Puzzles
(372)
Riddles
(369)
Difficulty Level 2/5
(360)
Trick Teasers
(300)
Popular Puzzles
(232)
Rebus Puzzles
(168)
Humor Puzzles
(161)
Series Puzzles
(138)
Interview Puzzle
(131)
What Word Am I
(103)
Difficulty Level 1/5
(90)
Equation Puzzles
(85)
Trivia
(79)
Mystery Puzzles
(76)
Who Am I
(60)
Difficulty level 5/5
(59)
Murder Mystery Puzzles
(45)
Algebra
(41)
Probability Puzzles
(40)
Square Count
(40)
Cipher Puzzles
(38)
IAS-EXAMS
(35)
Science Puzzles
(34)
MatchSticks-Riddles
(28)
Situation Puzzles
(28)
Puzzles of Age
(23)
statement
(19)
Google Interview Puzzle
(18)
Read Between Lines Puzzles
(18)
Microsoft Interview Puzzles
(16)
Odd One Out
(15)
Time Distance Problem
(14)
Relationship Puzzles
(12)
Cards
(11)
Story Puzzles
(11)
Paradox Puzzles
(9)
Classic
(6)
Directional Puzzles
(6)
Best Of 2011
(5)
clever
(5)
Analytical
(4)
Brain-Twister
(4)
Mind Games
(4)
chess
(4)
What Does This Text Mean
(3)
CHALLENGING
(2)
Double Meaning
(2)
Acronym
(1)
Measure
(1)
Suduko
(1)
Video Riddle
(1)
coin-Puzzles
(1)
m
(1)
pop
(1)
triv
(1)

After

ReplyDeleteA(A-2)=A-2

next step should be

A(A-2)-A+2=0

And then

A^2-3A+2=0

now solve this equation A , answer will be 1 and 2

To get from A(A-2) =A-2 to A=1 you divided by zero. 0/0 does not equal 1.

ReplyDeleteya . we cannot divide by zero.

Deletenothing wrong in those equations...

ReplyDeletethat was perfectly correct:)

A-2=0, as A is taken as 2, it cannot be cancelled...

ReplyDeleteLogic:

ReplyDeleteA-2 = 0 so we can not divide by 0 in line 5

A(A-2)=A-2 to reach the step after this we cannot divide both sides by 0.

ReplyDeleteAs A-2=0, we can not divide LHS and RHS by A-2.....

ReplyDeleteSo the logic is wrong....

A = 2

ReplyDeleteA(A-1) = 2(A-1)

This sentence is wrong

If you multiply something in both sides of an equation IT SHOULD NOT BE ZERO cuz it will be always correct

eg.

1 = 100

1(0) = 100(0)

0 = 0 is correct

thus 1 = 100 is correct