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Odd natural numbers...
This is a discussion on Odd natural numbers... within the Brainteasers forums, part of the Brain Gym category; Consider the pattern shown below: 1 3 5 7 9 11 13 15 17 19 ... which number comes first in the 81st row?...
01-13-2007
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Odd natural numbers...
Consider the pattern shown below:
1 3 5 7 9 11 13 15 17 19 ... which number comes first in the 81st row?
__________________
Cheers, :) James:) 
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01-13-2007
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Re: Odd natural numbers...
NO...
 James
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01-13-2007
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Re: Odd natural numbers...
I think the answer is "6481"
explanation the last number of each row is obtained by a formula row number* rownumber+the number of terms in prevoius row eg 2nd row : 2*2+1=5 (5 is last number of sec row) 3rd row: 3*3+ 2=11(11 is the last number of third row) 4 th row 4*4+3 =19(19..................................fourth row) .... .... 80 th row 80*80+79=6479(6479...................80 th row) therefore fiirst number is 6481 hope iam right? bye
__________________
:) NEVER SAY DIE.
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01-13-2007
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Re: Odd natural numbers...
Good work buddy...
__________________
Cheers, :) James:)
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01-13-2007
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Re: Odd natural numbers...
earlier i got the wrong answer
since i found the last number of 81st row i did 81*81+80=6641. thats where i did mistake bye
__________________
:) NEVER SAY DIE.
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