Mathematical Proof That  2 = 1
Searching for a math impossibility

Try this one out - see if you can find the hole here!
(Don’t scroll down until you’ve given it a good shot ...)

Initial supposition    x = y
Multiply both sides by x:     xx = xy
Subtract y squared from both sides:     xx - yy = xy - yy
Factor both sides:     (x + y)(x - y) = y(x - y)
Divide both sides by (x - y):     x + y = y
Substitute y for x, based on initial supposition:     y + y = y
Replace y with any number (eg. 1):     1 + 1 = 1 or 2 = 1

Scroll down to see the ‘flaw’ ...

The step that divides through by (x - y) is effectively dividing by zero, based on the initial supposition. That invalidates the subsequent results.

see also   College  &  School  Sections
Math Puzzle


Turntable Bike

Sail Flight

Number Eight Laziness

Newfie Snowplow

Safety Nap

$383.00 Paint Job

Boneless Chicken

Hiking For Beginners

Mustache Soother

Been Sleeping In The Sun

Instant Karma

Parking Gate

Tennessee Family

Robot Hood

Shadow Junk Art

Baby High Chair

Fast Flower

Men To The Left

Think Outside

Gin and Tonic Diet
Full list of creditsFacebookTwitterDiggStumbleUponDelicious