Latest TCS Aptitude Question SOLUTION: 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

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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

Asked In TCS sridurgauppalapati (10 years ago)

Unsolved Read Solution (12)

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Read Solution (12) :

sravan  (10 years ago)

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

Is this solution Helpfull? Yes (29) | No   

shamithru  (10 years ago)

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

Is this solution Helpfull? Yes (3) | No   

pritam kundu  (10 years ago)

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...

Is this solution Helpfull? Yes (2) | No   

NARAYANA SWAMY DAMMALA  (10 years ago)

30 is odd..bcaz it followes 5 multiples in powers of 3

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ziauddin  (10 years ago)

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

Is this solution Helpfull? Yes (1) | No   

Somnath Yadav  (7 years ago)

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

Is this solution Helpfull? Yes (1) | No (1)  

lucky  (10 years ago)

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

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lucky  (10 years ago)

sorry i have wrote 15 its 30 you have to replace it with 45

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Amit Kumar Pal  (10 years ago)

ans is 30

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Subashini Sivasankaran  (7 years ago)

c) 60
Bcoz other than 30 all are 3 powers

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sanskriti  (7 years ago)

The answer is 30 as it gives-
5*3=15,15*3=45 and so on....

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magaan  (6 years ago)

30
15/5 =3
405/5=3
1215/405=3
3645/1215=3
but 30/15=2 hence 30 is answer

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