What is the next number of the following sequence
8,8,15,23,39.....

• 8,8,15,23,39, x
  8 + 8 = 16 ==> 16 - 1 =15
  8 + 15 = 23==> 23 + 0 =23
  15 + 23 = 38=> 38 + 1 =39
  23 + 39 = 62=> 62 + 2 = 64
  
  Ans : 64
  
• 10 years agoHelpfull: Yes(77) No(5)
• it's a series of:
  (8,8) (15,23) (39,__), where
  the difference between the numbers are in sum of 8.
  8-8=0
  23-15=8
  39-23=16
  therefore,
  next no will be 63
  63-39=24
• 10 years agoHelpfull: Yes(17) No(5)
• answer will be 55
  (8,8)=diff is 0
  (15,23)=diff is 8
  next diff will be 16
  so next no will be=39+16=55
• 10 years agoHelpfull: Yes(2) No(6)
• 2*3=6
  3*6=18
  6*18=108
  18*108=1944
  ans = 1944
• 10 years agoHelpfull: Yes(0) No(5)