12,3,15,14,6,19,16,9,23,18,12

• Ans=27
  12+3=15-0=15
  14+6=20-1=19
  16+9=25-2=23
  18+12=30-3=27
• 12 years agoHelpfull: Yes(76) No(1)
• this can be split in 3 forms..
  12,_,_,14,_,_16,_,_18,_,_,20.. difference s 2
  3,_,_,6,_,_9,_,_12,_,_15..this s 3 table
  15,_,_,19,_,_,23,_,_,27..difference s 4
  therefore next numb s 27,20,15
• 12 years agoHelpfull: Yes(28) No(2)
• ans is 27;
  take 12,3,15 12+3=15-0=15
  14+16=20-1=19
  16+9=25-2=23
  18+12=30-3=27
• 12 years agoHelpfull: Yes(3) No(1)
• 12,3,15,14,6,19,16,9,23,18,12
  12,14,16,18.20 continue
  then 3+15=18
  6+19=25
  9+23=32
  12+27=39
  so ans is 27
• 11 years agoHelpfull: Yes(0) No(1)
• Pair in to 3 i.e., 12,3,15 14,6,19 16,9,23 18,12,?
  15-12=3
  19-14=5
  23-16=7
  Now difference should be 9 so he answer will be 27....As 27-18=9
  
• 8 years agoHelpfull: Yes(0) No(0)