1 ,8, 21 ,42 ,73, 116 , next number

• Given series= 1-8-21-42-73-116-?
  difference b/w series= 1-8=7,8-21=13,21-42=21,42-73=31,73-116=43 so(7,13,21,31,43)
  so again difference b/w previous diff values: 7-13=6,13-21=8,21-31=10,31-43=12 so (6,8,10,12,so next value=14)
  43+14=57
  116+57=173
  Ans: 173
  
• 10 years agoHelpfull: Yes(5) No(0)
• 1-8-21-42-73-116-?
  7 13 21 31 43
  6 8 10 12 14
• 10 years agoHelpfull: Yes(3) No(1)
• 8-1=7 21-8=13 42-21=21 73-42=31 116-73=43
  7,13,21,31,43
  13-7=6 21-13=8 and so on we got 6,8,10,12
  43+14=57
  57+116=173
  s0 next no is 173
  
• 10 years agoHelpfull: Yes(1) No(0)
• 8-1=7
  21-8=13
  42-21=21
  73-42=31
  116-73=43
  in answers,differences of numbers increased by 6,8,10,12 then next difference number is 14 then calculated ans is 173
• 10 years agoHelpfull: Yes(0) No(0)