Can any one prove 2+2=5?

Question

Every one says 2+2=5 but can any one prove it mathematically

Answer 1

* Start with the identity
− 20 = − 20

* Express both sides in slightly different, yet equivalent ways
25 − 45 = 16 − 36

* Factor both sides
5^2 - 5 \times 9 = 4^2 - 4 \times 9

* Add the same thing to both sides
5^2 - 5 \times 9 + \frac{81}{4} = 4^2 - 4 \times 9 + \frac{81}{4}

* Now factor both sides again
\left(5 - \frac{9}{2}\right)^2 = \left(4 - \frac{9}{2}\right)^2

* Take the square root of both sides
5 - \frac{9}{2} = 4 - \frac{9}{2}

* Cancel the common term
5 = 4

*Proof
2+2=5

Answer 2

Hello vinit,well we can prove 2+2=5 or anything like that by assuming i.e by providing an extra value to an already available value.
To put it bluntly it is an easy question with a simple yet not so well known concept,by assuming the value of 1+1=3,that must also apply to 1+2=4 then it also applies to this equation of 2+2=5.If 2+2 is not equal to 5,then 1+1 is not equal to 3 then that will not be possible but since we have proved 2+1=4 by assuming 1+1=3, then it automatically with conviction proves that 2+2=5. These are questions asked in CAT for confusing the test takers but it is pretty simple.

Answer 3

I dont think it can be "proven". George Orwell and Thom Yorke among others have made interesting attempts though...

2+2=5 is just an expression for a situation where an authority figure asserts something is true to the public that blatantly isnt true, or when someone willfully rejects logic on their own, just to assert the freedom to choose the illogical.

Its a stretch, but you might say 2+2=5 equals five when youre dealing with compounded error from rounding. For example 2.4+2.4=4.8 (rounded to 5).

Answer 4

don't you mean 2+2=4? was that a typo?

2+2=4
-2 -2
2=2 or ▲ ▲ + ▲ ▲ = ▲▲▲▲

2+2 does NOT equal 5

2+2=5
-2 -2
2=3 ? no WAY!!! ♥ ♥ + ♥ ♥= ♥ ♥ ♥ ♥ ♥ NO!!

Answer 5

to me alas! every one say 2 + 2 = 4, which is also mathematically correct and i can prove it.

Answer 6

If you can prove 2 + 2 = 5, then if you study you will fail.
example;

It is accepted that,
Study = Dont Fail &
Dont Study = Fail

So,
Study + Dont Study = Fail + Dont Fail

means,
Study ( 1 + Dont ) = Fail ( 1 + Dont )

Thus,
Study = Fail

PROVED.

Answer 7

one can prove only after violating laws of mathematics.

Answer 8

Well, I found an invalid proof on Wikipedia, but besides that, nope. Here is the link: http://en.wikipedia.org/wiki/False_proof#Proof_that_4_equals_5

(sorry, it doesn't copy well here)

And I guess it depends what kind of 2 you are using. If you are using 2.49 + 2.49 and then you round up...

Answer 9

For very large values of 2 that statement is correct.

Answer 10

Are you talking about the Hindi movie Do Aur Do Panch?