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Algebra

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1 Jan 2008 12:18:16 IST

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dis one frm progression

None

in da sequence 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5..........where n consecutive terms have da value n, the 150th term is?

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Tarin Bansal

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Joined: 27 Jul 2007

Posts: 3134

1 Jan 2008 16:35:17 IST

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I am getting 150th term=16.
Am I right? I think I am.

Well we know that sum of n consecutive natural numbers is n(n+1)/2.
As the series is made by n consecutive natural numbers,
put n(n+1)/2=150
U will get 16.8...
The answer will be [16.8] where [.] means greatest integer.
Hence the answer is 16.

pavithra raghav

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1 Jan 2008 21:49:51 IST

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thanks, but de answer is 17. thanks i understood

Tarin Bansal

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Joined: 27 Jul 2007

Posts: 3134

1 Jan 2008 22:11:52 IST

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Oh ya. Sorry. The ans is 17.

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