What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12

• correct answer is 9
  
  look at the first and last no in the series...
  
  8 + 12 =20
  2 + 18 =20
  14 + 6 =20
  6 + 14 =20
  then obviously,
  11 + (9) =20 ***
• 10 years agoHelpfull: Yes(11) No(2)
• 8-2 =6
  14-6 =8
  11-? =6
  14-6 =8
  18-12 =6
  so the difference should be 6 and 8 consecutively.so 11-5=6. so the answer is 5.
• 12 years agoHelpfull: Yes(5) No(9)
• 8-2 =6
  14-6 =8
  11-x =6
  14-6 =8
  18-12 =6
  so the difference should be 6 and 8 consecutively.so 11-5=6. so the answer is x=5.
  
  
• 10 years agoHelpfull: Yes(0) No(0)