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@Kaustubh Katdare • 04 Aug, 2008
The series is -
12,12,18,45,180,1170,?
What's the next number in above series?
12,12,18,45,180,1170,?
What's the next number in above series?
@bayazidahmed • 07 Aug, 2008
12285
Shall I give the solution or wait for some one else to rattle their brain and figure it out?
Shall I give the solution or wait for some one else to rattle their brain and figure it out?
@Kaustubh Katdare • 07 Aug, 2008
If no one replies in next 24 hours, post the explanation!
😁 Wait!bayazidahmed12285
Shall I give the solution or wait for some one else to rattle their brain and figure it out?
If no one replies in next 24 hours, post the explanation!
@bayazidahmed • 09 Aug, 2008
I am too busy to post the explanation now. I'll leave it for another 24 hours.
@mahul • 09 Aug, 2008
Yep, my answer matches with that of bayazidahmed, 12285.
Here's the solution:
Lets name the general term of the sequence T(n)
The sequence (say R(n)) where R(n)=T(n+1)/T(n)
is 1,1.5,2.5,4,6.5...
The sequnece (say S(n)) where S(n)=R(n+1)-R(n)
is 0.5,1,1.5,2.5....
Thus S(n) can be thought of a fibonacci style sequence where S(n)=S(n-1)+S(n-2)
Considering this relation, the next term in S(n) would be 1.5+2.5=4
Considering this, the next trem in R(n) would be 6.5+4=10.5
Thus the next term in T(n)=1170*10.5 = 12285
Here's the solution:
Lets name the general term of the sequence T(n)
The sequence (say R(n)) where R(n)=T(n+1)/T(n)
is 1,1.5,2.5,4,6.5...
The sequnece (say S(n)) where S(n)=R(n+1)-R(n)
is 0.5,1,1.5,2.5....
Thus S(n) can be thought of a fibonacci style sequence where S(n)=S(n-1)+S(n-2)
Considering this relation, the next term in S(n) would be 1.5+2.5=4
Considering this, the next trem in R(n) would be 6.5+4=10.5
Thus the next term in T(n)=1170*10.5 = 12285
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