What is the missing number in the series? 6, 11, 18, 27, 38, ? , 66
a)56
b)63
c)51
d)40
e)45

• 6, 11, 18, 27, 38, ? , 66
  
  next term is obtained by adding next odd nos in previous no.
  
  6, 11, 18, 27, 38, 51 , 66
  
  so missing number is 51 .........option c)
• 12 years agoHelpfull: Yes(4) No(1)
• difference b/w the numbers is increase odd series so look 11-6=5
  18-11=7....
  38+13=51
• 9 years agoHelpfull: Yes(1) No(1)
• the missing no is c) 51
  differences are increases like this 5,7,9,11,13
  so the missing one is =38+13=51
• 9 years agoHelpfull: Yes(1) No(0)
• mean values 5,7,9,11,13 so,,, 38+13 =51.
• 9 years agoHelpfull: Yes(0) No(0)
• 51 add with odd nums
• 7 years agoHelpfull: Yes(0) No(0)
• The answer is 51,because adittion of 38 & 11is 51 & addition of 51 & 11 is 66.
• 7 years agoHelpfull: Yes(0) No(0)
• we have
  11*2=22-4=18 we get 4 by 6-2
  18*2=36-9=27 similarly we get 9 by 11-2
  27*2=54-16=38 16 is got by doing 18-2
  38*2=76-25=51
  51*2=102-36=66
  so 51 is the answer
• 7 years agoHelpfull: Yes(0) No(0)
• answer is C.51
• 6 years agoHelpfull: Yes(0) No(0)
• 11-6=5
  18-11=7
  27-18=9
  38-27=11
  13+38=51,66............
• 6 years agoHelpfull: Yes(0) No(0)
• 6+5=11
  11+7=18
  18+9=27
  27+11=38
  so,38+13=51
• 6 years agoHelpfull: Yes(0) No(0)
• diff b/w 6 and 11 is 5
  diff b/w 11 and 18 is 7
  diff b/w 18 and 27 is 9
  diff b/w 27 and 38 is 11
  so the missing number is 38+13 = 51
  option c
• 5 years agoHelpfull: Yes(0) No(0)
• 11-6=5;18-11=7;27-18=9;38-27=11;51-38=13 so the dfference between two numbers is increase in consecutive odd numbers
• 5 years agoHelpfull: Yes(0) No(0)
• 51....add all odd integers
• 5 years agoHelpfull: Yes(0) No(0)
• difference between both the number is increemented by 2(38+13=51)
• 5 years agoHelpfull: Yes(0) No(0)
• 6,11,18,27,38,51,66
  6,11 difference is 5
  11,18 difference is 7
  18,27 difference is 9
  27,38 difference is 11
  38 ,51 difference is 13
  51,60 difference is 15
• 4 years agoHelpfull: Yes(0) No(0)