3,6,9,_,24,36 , what is the missing term?

• i think the series is a bit wrong.....the real series should be
  3,6,9,__,24,39
  ans : 15
  explanation : (3+6)=9, (6+9)=15, (15+9)=24, (24+15)=39
• 10 years agoHelpfull: Yes(24) No(7)
• 12
  (3 6 9)(12 24 36)
• 10 years agoHelpfull: Yes(23) No(4)
• 3, 6, 9, x, 24, 36
  
  3 + 6 = 9
  6 + 9 = 15
  9 + 15 = 24
  15 + 24 = 39
  
  Ans : 15
• 10 years agoHelpfull: Yes(6) No(7)
• 12
  
  (3,6,9)(12,24,36)
  
  if ans is 15 then 15+24=39 but in above sequence 36 is given.... check once..!!
• 10 years agoHelpfull: Yes(3) No(0)
• answr:15
  3,6,9,15,24,36
• 10 years agoHelpfull: Yes(2) No(2)
• Answer is 18.
  3*2= 6
  3*3(2+1)= 9
  6*3= 18(missing term)
  6*4(3+1)=24
  9*4=36
  9*5(4+1)=45
• 10 years agoHelpfull: Yes(2) No(2)
• 15
  3,3+3=6,6+3=9,9+6=15,15+9=24....
• 10 years agoHelpfull: Yes(1) No(2)
• ans:12
  3*2=6
  3*3=9
  
  12*2=24
  12*3=36
• 10 years agoHelpfull: Yes(1) No(0)
• 12 is ans
• 10 years agoHelpfull: Yes(0) No(0)
• 3,6,9,y ,24,36
  3*(1,2,3,x,8,12)
  def bet (1,2)=1, (2,3)=1,(3,x)=2 ,(x,8)=3 , (8,12)=4
  1 1 2 3 4
  1+(0*1) 1+(1*1) 1+(2*1) 1+(3*1)
  so that x=5
  y=3*5=15
  ans : 15
• 10 years agoHelpfull: Yes(0) No(0)
• 3+6=9
  6+9=15 Answer
  9+15=24
  15+24=37 ( i think wrong given 36)
• 10 years agoHelpfull: Yes(0) No(1)
• 3*2=6
  3*3=9
  
  so 12*2=24
  12*3=36
  
  ans is 12
• 9 years agoHelpfull: Yes(0) No(0)
• the difference between 3 and 9 is 6 simliary the difference between x and 36 is 24 so x value will be 12
• 9 years agoHelpfull: Yes(0) No(0)
• 3,6,9,x,24,36
  ans:12
  (3,6,9) is in the ratio 1:2:3 (x,24,36) will be in the ratio 1:2:3
  so x will be 12
  
  
  
• 9 years agoHelpfull: Yes(0) No(0)
• 9-6=3,
  15-9=6,
  24-15=9,
  36-24=12,
  51-36=15,
  ---------------
• 6 years agoHelpfull: Yes(0) No(0)