7,5,9,12,18,36,47,72,? pls ans wid method

• We can find ans as follows :
  5+(7*0) = 5
  5+(7*1) = 12
  12+(7*2) = 26
  26+(7*3) = 47
  47+(7*4) = 75...
• 12 years agoHelpfull: Yes(8) No(55)
• 144
  9,18
  18,36
  36,72
  72,144
• 12 years agoHelpfull: Yes(2) No(14)
• 110...
  (9-7)+(18-9)+(47-18)+72=110
• 12 years agoHelpfull: Yes(0) No(20)
• the serise is
  5, 9, 12, 18, 26, 36, 47, 72, _?
• 12 years agoHelpfull: Yes(0) No(1)