4+7+2 = 281435
7+3+9 = 212781
6+2+7 = 121456
2+8+5 = 164036
8+4+6 = ???????

• I think the answer is 322478 or 322470.
  
  Here's my logic:
  
  First four digits have been explained by everyone so I'll just explain the last two: 78
  
  How I got the number 7,
  In the first equation
  
  4+7+2=281435
  
  5th digit is 3. That's 4-1
  
  In the second equation
  
  7+3+9=212781
  
  5th digit is 8. That's 7+1
  
  In the third equation
  
  6+2+7=121456
  
  5th digit is 5. That's 6-1
  
  So there's a pattern of +1,-1,+1... for the 5th digit.
  
  By this pattern, the 5th digit for the required equation comes to be 7.
  
  Now the logic for last digit:
  
  To get the last digit of first two equations, add the digits on L.H.S and add 2 and write down the units place digit.
  
  4+7+2=281435
  4+7+2= 13
  13+2=15
  Write down the unit place digit.
  
  7+3+9=212781
  7+3+9=19
  19+2=21
  
  To get the last digit of third and fourth equations, add the digits on L.H.S and add 1 and write down the units place digit.
  
  6+2+7=121456
  6+2+7=15
  15+1=16
  
  2+8+5=164036
  2+8+5=15
  15+1=16
  
  For the last digit there's a pattern of +2,+2,+1,+1 so the next addition will be +0
  
  8+4+6=322478
  8+4+6=18
  18+0=18
  
  Or,
  
  The next addition will be +2, if the pattern followed is +2,+2,+1,+1,+2,+2...
  
  8+4+6=322470
  8+4+6=18
  18+2=20
  
  Hence the answer 322478 or 322470.
  
• 8 years agoHelpfull: Yes(5) No(1)
• 322477 guess
• 8 years agoHelpfull: Yes(1) No(1)
• 322472
  let x+y+z
  multiply the x*y to get top two highest place
  then do the same process y*z for middle two digit
  for last two digit multiply two highest digit + highest digit *(lowest digit -1)
• 7 years agoHelpfull: Yes(0) No(0)