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Author Topic: ancient mathitics.  (Read 12270 times)

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Offline Big Dog

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Re: ancient mathitics.
« Reply #25 on: November 29, 2012, 07:19:51 PM »
Quote from: marv on November 29, 2012, 06:57:05 PM
Hey Dog, is that a firm maybe?

That is a firm "I don't know, and I refuse to cheat by using a calculator."

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Offline Dori

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Re: ancient mathitics.
« Reply #26 on: November 29, 2012, 08:02:23 PM »
Quote from: marv on November 27, 2012, 08:39:39 AM


Test your primitive non-calculator skills. Can you determine in thirty seconds if the number

4890767566789657453424859065646348799

is divisible by 3? Is it?

No
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Offline Chris_

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Re: ancient mathitics.
« Reply #27 on: November 29, 2012, 08:38:21 PM »
Yes.

I use the same method for figuring oil changes on my car(s). :p
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Offline marv

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Re: ancient mathitics.
« Reply #28 on: November 29, 2012, 09:00:35 PM »
Okay, class over.

The simple, primitive and easy way is.......

1. Strike through all zeros.

2. Strike through all threes, sixes and nines.

3. Strike through all remaining sets of digits that add up to numbers that are divisible by three; e.g. 8+4, 5+5+5, 7+7+1, 2+1, etc.

If whatever remains is not zero, the answer to whether the number is divisible by three is NO. If no digits remain, the answer is YES.

Try it.........
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Offline Chris_

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Re: ancient mathitics.
« Reply #29 on: November 29, 2012, 09:38:00 PM »
Regardless of what's in front of it, if the last digit (or pair of digits) is a factor of 3, it's generally divisible by 3.

Easy peasy.
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Offline Wineslob

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Re: ancient mathitics.
« Reply #30 on: November 30, 2012, 02:51:18 PM »
Quote from: MrsSmith on November 25, 2012, 06:08:32 PM
I can't believe I read that whole thing.  I'm going to make my husband read it so he can have a headache, too.


 :rofl:




Vesta, you OK? Didn't have a stroke, did you?
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Offline DumbAss Tanker

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Re: ancient mathitics.
« Reply #31 on: November 30, 2012, 03:23:01 PM »
Quote from: Wineslob on November 30, 2012, 02:51:18 PM
Vesta, you OK? Didn't have a stroke, did you?

But really, how would we know?

 :popcorn:
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Offline vesta111

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Re: ancient mathitics.
« Reply #32 on: November 30, 2012, 06:57:54 PM »
Quote from: DumbAss Tanker on November 30, 2012, 03:23:01 PM
But really, how would we know?

 :popcorn:

Easy Mr. DumbAss, when I begin to speak of Obama  in a kindly view point, then I have had a Minnie stroke. A minor stroke is when I begin to speak of old Joe Biden as a statesman.  A middling stroke I will begin to extold all Barney Frank has done for us.

A major stroke is when I am carted off muttering about some Nebraska Coach that sleeps naked, and owns cats.
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Offline franksolich

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Re: ancient mathitics.
« Reply #33 on: December 01, 2012, 04:54:38 AM »
Whoa.

I just got around to reading this thread.

It's, uh, not quite what I'd expected; I hadn't checked to see who the original poster was.
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Offline MrsSmith

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Re: ancient mathitics.
« Reply #34 on: December 01, 2012, 05:59:36 AM »
Quote from: vesta111 on November 30, 2012, 06:57:54 PM
Easy Mr. DumbAss, when I begin to speak of Obama  in a kindly view point, then I have had a Minnie stroke. A minor stroke is when I begin to speak of old Joe Biden as a statesman.  A middling stroke I will begin to extold all Barney Frank has done for us.

A major stroke is when I am carted off muttering about some Nebraska Coach that sleeps naked, and owns cats.


OK, now that was funny.   :rofl:
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Offline DumbAss Tanker

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Re: ancient mathitics.
« Reply #35 on: December 01, 2012, 07:06:29 AM »
Well now, I thought a Minnie stroke would be when you started wearing a bow on top of your head and your ears got really, really big...
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Offline vesta111

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Re: ancient mathitics.
« Reply #36 on: December 01, 2012, 09:36:18 AM »
Quote from: DumbAss Tanker on December 01, 2012, 07:06:29 AM
Well now, I thought a Minnie stroke would be when you started wearing a bow on top of your head and your ears got really, really big...

Heard about her, the scourage of the water front.  She was known to slip sailors a Mickey and rob them blind.
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Offline DumbAss Tanker

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Re: ancient mathitics.
« Reply #37 on: December 01, 2012, 05:35:04 PM »
Quote from: vesta111 on December 01, 2012, 09:36:18 AM
Heard about her, the scourage of the water front.  She was known to slip sailors a Mickey and rob them blind.

H5, vesta!

 :lmao:
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Go and tell the Spartans, O traveler passing by
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Anything worth shooting once is worth shooting at least twice.
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