Find the next number in the series 3, 4, 6, 9, 13,?

18

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ritu

  • Oct 18th, 2006
 

tell me

 how is the ans is 18

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kamala.kanta

  • Oct 26th, 2006
 

ans:18bzelet n=3, then the numbers are n,n+1,n+2,n+3,n+4,n+5.....

maruthi

  • Mar 19th, 2007
 

18 is correct but the explanation is wrong.
Here see the difference.
3  4        4  6        6   9         9  13           13  18
 ----       ------       ------         -------          --------
  1            2            3               4                  5

is it clear?

ag005

  • Sep 1st, 2009
 

First No. is 3 and second is 4 so the difference is 1
Now the 3 rd no is 6 so d diff is 2(6-4)
next no is 9
and hence difference is 3(9-6)
now next no in series is 13 and difference is 4(13-9)
so
this is a progressive a.p where differences increases by 1 and next tym
so
the difference now will be 5, and adding it to 13 you will get 18

Sathya Muthusamy

  • May 4th, 2016
 

18

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