12, 6.5, 7.5, 12.75, 27.5, 71.25, ?

• 12, 6.5, 7.5, 12.75, 27.5, 71.25, ?
  12
  (12+1)*0.5=6.5
  (6.5+1)*1=7.5
  (7.5+1)*1.5= 12.75
  (12.75+1)*2= 27.5
  (27.5+1)*2.5= 71.25
  (71.25+1)*3= 72.25*3= 216.75
• 10 years agoHelpfull: Yes(5) No(1)
• ans: 216.75
  
  12 * 0.5 + 0.5 = 6.5
  6.5 * 1 + 1 = 7.5
  7.5 * 1.5 + 1.5 = 12.75
  12.75 * 2 + 2 = 27.5
  27.5 * 2.5 + 2.5 = 71.25
  71.25 * 3 + 3 = 216.75
• 10 years agoHelpfull: Yes(1) No(1)