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a simple pattern.?!


Best Answer witzar, 01 April 2013 - 01:59 PM

Spoiler for obvious formula for n-th term
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10 replies to this topic

#1 BMAD

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Posted 28 March 2013 - 06:50 PM

James was in his favorite Math class when his professor wrote on the board the following elementary pattern:

 

2, 4, 6, 8, ___.  Asked to find the next value, James quickly raised his hand and exclaimed that the answer was 10.  The professor, with a concerned and shocked expression on his face, asked James to settle down.  When all of the other students looked equally puzzled, the professor explained to them (in an admonishing tone) that the correct number is in fact 34.  Seeing the class was still perplexed, the teacher added even the next term after the fifth one showing:

 

2, 4, 6, 8, 34, 132.

 

 

Now, the group was tasked to not only find the next term but they also had to find the value that came before the one listed on the board.

 

 

What are these two numbers?


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#2 BMAD

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Posted 28 March 2013 - 08:06 PM

before the FIRST one listed on the board.


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#3 bonanova

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Posted 30 March 2013 - 06:42 AM

Spoiler for maybe


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#4 BMAD

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Posted 30 March 2013 - 02:16 PM

Spoiler for maybe


Spoiler for Forgive me

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#5 witzar

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Posted 01 April 2013 - 01:59 PM   Best Answer

Spoiler for obvious formula for n-th term

Edited by witzar, 01 April 2013 - 02:01 PM.

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#6 dark_magician_92

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Posted 01 April 2013 - 04:44 PM

Spoiler for obvious formula for n-th term

How did you get that? Awesome!


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#7 BMAD

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Posted 02 April 2013 - 11:08 AM

Spoiler for obvious formula for n-th term

Unless I made a computation mistake, I am getting 137 when n=6 not 132 using your formula.
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#8 karthik

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Posted 02 April 2013 - 11:54 AM

Spoiler for obvious formula for n-th term

Unless I made a computation mistake, I am getting 137 when n=6 not 132 using your formula.

you did make a computation mistake, it's 132 when n=6.


Edited by karthik, 02 April 2013 - 11:55 AM.

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#9 BMAD

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Posted 02 April 2013 - 12:19 PM

Is it too late to blame the calculator?
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#10 BMAD

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Posted 02 April 2013 - 12:36 PM

Spoiler for answer:People assume too much when they see patterns

Edited by BMAD, 02 April 2013 - 12:43 PM.

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