Crusoe hatched from a mysterious egg discovered by Angus, was growing at a fast pace that Angus had to move it from home to the lake. Given the weights of Crusoe in its first weeks of birth as 5, 15, 30,135, 405, 1215, 3645. Find the odd weight out.
option
a) 3645
b) 135
c) 30
d) 15

• 30.
  5
  5*3=15
  15*3=45(here it is given as 30)
  45*3=135
  135*3=405
  405*3=1215
  1215*3=3645
• 10 years agoHelpfull: Yes(29) No(0)
• 30 is the odd weight bcoz 5*3=15,15*3=45,45*3=145 and it goes on so odd weight s 30 it should b 45
• 10 years agoHelpfull: Yes(3) No(0)
• 30 is the odd weight..is should be 45...the weights are equal to 15*3^n.. n=-1,0,1,2,3,4,5...only '30' violets the series...
• 10 years agoHelpfull: Yes(2) No(0)
• 30 is odd..bcaz it followes 5 multiples in powers of 3
• 10 years agoHelpfull: Yes(2) No(0)
• initially the weight is 5
  5*3 =15,15*3=45,45*3=135........its clear that next number increases at multipve of 5
  so the answer is 30
• 10 years agoHelpfull: Yes(1) No(0)
• answer is 3645..let me explain how..
  considering the question it makes a series..5,15,30,135,405,1215,3645
  taking 5 common from all we get,
  5(1,3,6,27,81,243,723)
  now if we see the numbers within the bracket we observe that 1 is 3^0
  3 is 3^1
  6 is 3^2
  27 is 3^3
  81 is 3^4
  243 is 3^5
  but next should be 3^6 i.e 729 but in series we find it is 723 ..
  hence 3645 is the odd one out..
  hope it solves your confusions
  
• 7 years agoHelpfull: Yes(1) No(1)
• 15 is the odd man and if we replace it with 45 each upcoming term when divided with previous term gives the quotient 3 try it
• 10 years agoHelpfull: Yes(0) No(2)
• sorry i have wrote 15 its 30 you have to replace it with 45
• 10 years agoHelpfull: Yes(0) No(0)
• ans is 30
  
• 10 years agoHelpfull: Yes(0) No(0)
• c) 60
  Bcoz other than 30 all are 3 powers
  
• 7 years agoHelpfull: Yes(0) No(0)
• The answer is 30 as it gives-
  5*3=15,15*3=45 and so on....
• 7 years agoHelpfull: Yes(0) No(0)
• 30
  15/5 =3
  405/5=3
  1215/405=3
  3645/1215=3
  but 30/15=2 hence 30 is answer
• 6 years agoHelpfull: Yes(0) No(0)