18,24,5,21,8,27,17,23,4,24,30,?

• If we carefully look at series, then it can be divided as
  (18,24,5 ) (21,27,8) (17,23,4) (24,30,?)
  now in each group 2nd no = 1st no+6
  3rd no= 2nd no -19
  so by this missing no= 30-19=>11
  
  
• 11 years agoHelpfull: Yes(33) No(9)
• this series will be divided into
  18 24 5
  21 27 8
  17 23 4
  24 30
  
  18+3=21-4=17+7=24
  24+3=27-4=23+7=30
  so
  5+3=8-4=4+7=11
• 11 years agoHelpfull: Yes(33) No(2)
• @glory..
  here is 21,8,27 in series..but you consider21,27,8..this is confusing..
  plz clear it
• 11 years agoHelpfull: Yes(30) No(1)
• the series can be divided as
  (18,24,5 ) (21,27,8) (17,23,4) (24,30,?)
  in each group 2nd no = 1st no + 6
  3rd no = 2nd no - 19
  so by this no= 30 - 19 = 11
  
• 11 years agoHelpfull: Yes(1) No(5)
• 18,24,5,21-- 18+5-2=21
  8,27,17,23-- 8+17-2=23
  4,24,30,x -- 4+30-2=32
  
  32 is answer
• 10 years agoHelpfull: Yes(0) No(3)