FIND THE MISSING NO. IN SERIES ? 3 8 15 ? 61 124

• 2^2-1=3,2^3=8,2^4-1=15,2^5=32,2^6-3=61,2^7-4=124
  
  3,8,15,32,61,124
• 6 years agoHelpfull: Yes(14) No(46)
• Answer: 32
  
  (3 x 2) + 2 = 8
  (8 x 2) -1 = 15
  (15 x 2) + 2 = 32
  (32 x 2) - 3 = 61
  (61 x 2) + 2 = 124
• 6 years agoHelpfull: Yes(13) No(11)
• 2^1=2
  2^2 -1=3
  2^3 =8
  2^4 -1 =15
  2^5 =32
  2^6 -1 =61
  2^7 =124
  ans is 2 nd 32
• 5 years agoHelpfull: Yes(6) No(10)
• 31
  
  3=1*2+1
  
  8=3*2+2
  
  15=8*2-1
  
  31=15*2+1
  
  61=31*2-1
  
  124=61*2+2
  
  answer 31
• 5 years agoHelpfull: Yes(2) No(1)
• 32
  2^2-1 2^3 2^4-1 2^5
• 6 years agoHelpfull: Yes(1) No(5)
• 31. 3*2+2=8,8*2-1=15,15*2+1=31,31*2-1=61,61*2+2=124
• 6 years agoHelpfull: Yes(1) No(2)
• 1^2-1=0
  2^2-1=3
  .............
  ............
  5^2-1=24
  so the ans will be 0 & 24
• 5 years agoHelpfull: Yes(1) No(1)
• 3×2+2=8,8×2-1=15,15×2+2=32,32×2-3=61,61×2+2=122,122×2-5=239---------
  So ans is 32
• 4 years agoHelpfull: Yes(1) No(0)
• 2 3 8 15 32 61 124
• 6 years agoHelpfull: Yes(0) No(9)
• 24 as the difference between numbers is 5
• 6 years agoHelpfull: Yes(0) No(10)
• 3 3*2+2=8 8*2-1=15 15*2+1=31 31*2-1=61 61*2+2=124
• 6 years agoHelpfull: Yes(0) No(3)
• 3*2=6+2=8
  8*2=16-1=15
  15*2=30+2=32
  ans=32
• 5 years agoHelpfull: Yes(0) No(2)
• 2*2-1 2*3-1 2*4-1 2*5-1 then ans is 31
• 5 years agoHelpfull: Yes(0) No(0)
• 1*2+1=3
  3*2+2=8
  8*2-1=15
  15*2+2=32
  32*2-3=61
  61*2+2=124
• 4 years agoHelpfull: Yes(0) No(1)