4+7=1281
4+6=1240
8+3=1241
9+9=?

• x+y = ABCD
  BC = x*y
  AD=x+y
  e.g. 4+7
  BC=4*7=28
  AD=4+7=11
  ABCD = 1281
  ..
  
  .
  
  similarly
  9+9=1818
  
  4+7=1281
  4+6=1240
  8+3=1241
  9+9=1818
• 11 years agoHelpfull: Yes(12) No(0)
• as in all the cases the middle two digit are the multiplication of both the numbers(4*7=28) and side two digit are addition of both the no(4+7=11)...and arrange them in this order 1281...so on for all the cases...for 9+9=1818.
• 11 years agoHelpfull: Yes(2) No(1)
• 9+9=1818 9+9=18;1 placed in thousands place and 8 in ones place 9*9=81 81 is middle of the number
• 11 years agoHelpfull: Yes(0) No(0)
• 4+7=11 4*7=28 =>1281
  4+6=10 4*6=24 => 1240
  8+3=11 8*3=24 => 1241
  9+9=18 9*9=81 => 1818
• 9 years agoHelpfull: Yes(0) No(0)