4,7,15,31,35,19,11,?

• Ans: 8
  Find the diff between each digits:
  7-4=3
  15-7=8
  31-15=16
  35-31=4
  19-35=-16
  11-19=-8
  i.e. it shows a series 3,8,16,4,-16,-8,-3
  that means next digit would be 8.
• 10 years agoHelpfull: Yes(7) No(1)
• Answer - 8
  Because 7-4=3
  15-7=8
  31-15=16
  19-11=8
  11-8=3
  
  Series is - 3,8,16,4,-16,-8,-3
  35-31=4
  35-19=16
  
• 10 years agoHelpfull: Yes(0) No(0)
• 8
  4 + 3 =7
  7 + 8 = 15
  15 + 16 = 31
  31 + 4 = 35
  reverse operations now....
  35 - 16 = 19
  19 - 8 = 11
  11 - 3 = 8
• 10 years agoHelpfull: Yes(0) No(0)
• answer is 8.
• 7 years agoHelpfull: Yes(0) No(0)