Solve the equation

1+2 =3
1+3=7
1+4=12
1+5 = ?
Try to solve this. It's easy. We'll see if someone can solve it.

If its of format
1+a=n (considering 1+(-a)=n-2)
1+b=n+4
1+c=n+4+5

So by this, we get 1+d=n+4+5+6
Here, d is 5 and n is 3, we get
1+5=18 [Ans]

@SHAMENDRA said in #1:
> 1+2 =3
> 1+3=7
> 1+4=12
> 1+5 = ?
> Try to solve this it's easy. We'll see if someone can solve it.
1+3 = 7 and 1+4 = 12 I am pretty sure that you failed your first-grade maths exam

@saurabhsangeeth said in #3:
> 1+3 = 7 and 1+4 = 12 I am pretty sure that you failed your first-grade maths exam
Excuse me it's a puzzle. Try to solve it. There is a correct answer. I think you the person who failed maths.

@saurabhsangeeth said in #3:
> 1+3 = 7 and 1+4 = 12 I am pretty sure that you failed your first-grade maths exam
@SHAMENDRA said in #4:
> Excuse me it's a puzzle. Try to solve it. There is a correct answer. I think you the person who failed maths.
Shamendra is right there is a answer. And that is 18.