Question

2+2 = what is annwer

Answer 1

22
and 4
is the answers

Answer 2

Well, 2 + 2 is........ { A hypothetical question }
Normally, we'd say 4...... but how ???
Let's see ---->

Two plus two equals four
Proof: --> 

The set of integers is an (infinite) group with respect to addition.
Since 2 is an integer, the sum of 2 and 2 must also be an integer.

Suppose, for the sake of contradiction, that 2 + 2 < 4.
 
We have 2 > 0. Adding two to both sides, we get
2+2 > 0+2
Since 0 is the identity element for addition, we have 2 + 2 > 2.
Hence 2 < 2 + 2 < 4 so 2 + 2 must equal 3.
Since 3 is prime, by Fermat’s Little Theorem,
we have the following for a ∈ : $Z ^ {+}$
 $a ^ { 3 - 1 }$ ≡ 1 (mod 3)
 =>  $a ^ { 3 - 1 }$ ≡ 1 (mod 2 + 2)
 But  $a ^ { 3 - 1 }$ = a³ / a = a × a × a / a = a × a
and, for a = 2,
 2 × 2 ≡ 0 (mod 2 + 2)
Since, by the definition of multiplication, 2 × 2 = 2 + 2
So, we have $2 ^ { 3 - 1 }$ ≡ 0 (mod 2 + 2)
 $a ^ { 2 + 2 - 1 }$ ≡ 0 (mod 2 + 2)

This is a contradiction to Fermat’s Little Theorem, so 2 + 2 must not be prime. But 3 is prime.
Hence 2+2 must not equal 3, and therefore 2+2 ≥ 4.
It remains to show that 2 + 2 is not greater than 4.
To prove this we need the following lemma:
Lemma 1. ∀a ∈ Z, if a > 4, ∃b ∈ Z such that b > 0 and a − 2 = 2 + b.
If a were a solution to the equation 2 + 2 = a, then we would have a − 2 = 2 + 0. The lemma states that this cannot hold for any a > 4, and so a = 4, as desired. Therefore, 2 + 2 = 4

Hope you'd have the Answer next time a Horrible friend asks IF 2 + 2 = 4 ...... How????