6,9,11,13,17,20,22,24,28..?

• 31
  Two series 6, (+5)11, (+6)17, (+5)22, (+6)28 and
  9, (+4)13, (+7)20, (+4)24, (+7)31
• 10 years agoHelpfull: Yes(2) No(0)
• 6 + 3= 9
  9 + 2=11
  11 +2= 13
  13 + 4= 17
  17 + 3=20
  20+ 2=22
  22+2=24
  24+4=28
  28+ 3=31
  
• 10 years agoHelpfull: Yes(2) No(1)
• answer=31
  6+3=9
  9+2=11
  11+2=13
  13+4=17
  repetation of differences
  17+3=20
  20+2=22
  22+2=24
  24+4=28
  Repeat
  28+3=31
• 10 years agoHelpfull: Yes(1) No(1)
• 6,9,11,13,17,20,22,24,28,?
  here,
  Take alternative pairs,
  6-9=3
  11-13=2
  17-20=3
  22-24=2
  28-31=3
  
  the answer is 31
• 8 years agoHelpfull: Yes(0) No(0)
• 6+5=11 9+4=13
  11+6=17 13+7=20
  17+5=22 20+4=24
  22+6=28 24+7=31
• 7 years agoHelpfull: Yes(0) No(0)