Odd one out
5,15,30,135,405,1215,3645

• Ans is 30(3 rd term)
  first term 5
  second term 5*3=15
  third term 15*3=45 so there should be 45 instead of 30
  fourth term 45*3=135
  fifth term 135*3=405
  sixth term 405*3=1215
  sevnth term 1215*3=3645
  so odd one is 30, there should be 45 instead of 30.
• 10 years agoHelpfull: Yes(32) No(0)
• answer can be either 5 or 30
  
  5 coz it is only prime no in the series
  
  30 coz it is only even no in the series
• 10 years agoHelpfull: Yes(4) No(0)
• there are two possibilities,
  
  (i) all are the number is multiplied by 3 to get the next number
  i,e 5*3 =15
  15*3 = 45 but its 30
  45 * 3 = 135
  and so on
  so the odd number will be 30
  
  possibility (ii)
  
  all are divisible by 3 except 5
  so the odd number will be 5
  
  the answer depends on the option
• 10 years agoHelpfull: Yes(2) No(0)
• 30
  every digit is mutiple of 3
  5*3=15
  15*3=45
  .
  .
  .
• 10 years agoHelpfull: Yes(1) No(0)
• answer=5
  sum of digits of each number is divisible by 3
  1+5=6
  3+0=3
  1+3+5=9
  4+0+5=9
  1+2+1+5=9
  3+6+4+5=18
• 10 years agoHelpfull: Yes(1) No(0)
• answer is 135.
  5 * 3^0=5
  5 * 3^1=15
  5 * 3^2=45
  5 * 3^3=135....and so on .
• 10 years agoHelpfull: Yes(1) No(0)
• 30 since only even number in series. Plus does not follow 15-3= 45
• 10 years agoHelpfull: Yes(1) No(0)
• I THINK ANSWER IS 30 SINCE SERIES GOES LIKE THIS
  5*3=15
  15*3=45
  45*3=135
  135*3=405
  AND SO ON.................
• 10 years agoHelpfull: Yes(1) No(0)
• 30 should not be there as each new no is coming by multiplying the previous one with 3.
  so 5*3=15
  15*3=45
  45*3=135
  135*3=405
  405*3=1205
  1205*3=3645
• 8 years agoHelpfull: Yes(1) No(0)
• 5 is not divisibility of 3
  
  
• 10 years agoHelpfull: Yes(0) No(0)
• 5*3=15,15*3=45,45*3=135,135*3=405,405*3=1215,1215*3=3645
  
• 10 years agoHelpfull: Yes(0) No(0)
• 30 since all the numbers in the series are ending with 5 and 30 alone end with 0
• 10 years agoHelpfull: Yes(0) No(0)
• Ans-30
  x*3
• 10 years agoHelpfull: Yes(0) No(0)
• ans. 30 Because each term is multiplied by 3 with his previous values so the result will be 30 .
• 10 years agoHelpfull: Yes(0) No(0)
• 30 is the odd man
• 10 years agoHelpfull: Yes(0) No(0)
• 5*3=15
  15*3=45(but is given as 30)
  135*3=405
  405*3=1215
  1215*3=3645
  So th odd one out is---->30
• 10 years agoHelpfull: Yes(0) No(0)
• 30
  every digit is multiple of 3
  5*3=15
  15*3=45
  .
  .
  .
• 10 years agoHelpfull: Yes(0) No(0)
• all r divisible by 3 except 5.. so ans is 5
  
• 10 years agoHelpfull: Yes(0) No(0)
• ans = 30, it should be 45
  explanation…
  5x3=15
  15x3=45
  45x3=135
  135x3=405
  405x3=1215
  1215x3=3645
• 10 years agoHelpfull: Yes(0) No(0)
• Anwer is 5 because except 5 all are multiples of 15
  15*1=1
  15*2=30
  15*9=135
  15*27=405
  15*81=1215
  15*243=3645
• 10 years agoHelpfull: Yes(0) No(0)
• 30.all of them are ends with 5 except 30
• 8 years agoHelpfull: Yes(0) No(0)
• The odd one out is 30
  because each term in the series is equal to 3 times the previous term
  therefore 15*3 = 45 should be there in place of 30.
• 8 years agoHelpfull: Yes(0) No(0)