1+1=-1
2+2=1
3+3=3
..........
..........
20+20=?

and what is the formula?

• If we take the RHS to LHS, what ww get is 3 in every condition like
  
  1+1=-1. => 1+1+1=0 => 3=0
  Similarly,
  2+2=1 =>2+2-1=0 => 3=0
  3+3-3=0 => 3=0
  
  Like wise,
  20+20=37 => 3=0
  
  The answwr is 37
• 8 years agoHelpfull: Yes(2) No(0)
• As there is difference of 1+1=-1,so difference is 0,1,2..and another one just like same 20+20=40 so its differ from 3 so the answer is 37
• 8 years agoHelpfull: Yes(1) No(0)
• 1+1=2-3=-1
  2+2=4-3=1
  
  
  20+20=40-3=37
• 7 years agoHelpfull: Yes(1) No(0)
• 37 because at every step R.H.S increased by 2
  u can chk it
• 6 years agoHelpfull: Yes(0) No(0)