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Non Gaming Discussions => Off-Topic => Topic started by: Mr. Kennedy on February 08, 2002, 03:58:56 PM

Title: A real brainteaser... (for you vid)
Post by: Mr. Kennedy on February 08, 2002, 03:58:56 PM
My daughter is twice as old as my son and half as old as I am. In twenty-two years my son will be half my age. How old is my daughter?
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Title: A real brainteaser... (for you vid)
Post by: Troglodyte on February 08, 2002, 04:05:03 PM
22

d= daughter
s= son
f= father

d= 2s

f= 2d

(f+22)/2 = s+22     OR       s= ((f+22)/2)-22


so. . .

s= (2d+22)/2)-22

and then. . .

d= 2(2d+22)/2)-22) = 22
Title: A real brainteaser... (for you vid)
Post by: Mr. Kennedy on February 08, 2002, 04:29:21 PM
damn trog, you got it... guess your more clever than I thought...

wait til I get another one...

bwahahahahahaa!
Title: A real brainteaser... (for you vid)
Post by: Mr. Kennedy on February 08, 2002, 04:34:54 PM
It\'s an oldie, but no one got it but me.  Let\'s see if anyone has gotten wiser since last time.

A girl was eight years old on her first birthday. How could that be?
Title: A real brainteaser... (for you vid)
Post by: Kane on February 08, 2002, 06:55:40 PM
Quote
Originally posted by "The One" Billy Gunn
It\'s an oldie, but no one got it but me.  Let\'s see if anyone has gotten wiser since last time.

A girl was eight years old on her first birthday. How could that be?  


Well, if she was born on February 29, 1896 for example, the next time February 29th would occur would be 1904, or 8 years later.
Title: A real brainteaser... (for you vid)
Post by: Troglodyte on February 08, 2002, 09:37:20 PM
Quote
Originally posted by "The One" Billy Gunn
damn trog, you got it... guess your more clever than I thought...

wait til I get another one...

bwahahahahahaa!


Two words:

Discrete Mathematics

Twenty words:

I am taking the dang class for a second time.  I think I have got the logical approach down tight.
Title: A real brainteaser... (for you vid)
Post by: Bobs_Hardware on February 08, 2002, 10:21:57 PM
Quote
Originally posted by Kane


Well, if she was born on February 29, 1896 for example, the next time February 29th would occur would be 1904, or 8 years later.


how the hell did that work??
Title: A real brainteaser... (for you vid)
Post by: KillaX on February 09, 2002, 08:31:33 AM
leap year....correct me if I\'m wrong.


:hat:ScottyJ:hat:
Title: A real brainteaser... (for you vid)
Post by: Troglodyte on February 09, 2002, 12:34:45 PM
Quote
Originally posted by Bobs_Hardware


how the hell did that work??


Leap year happens every four years, EXCEPT "century years should only be leap-years if they were divisible by 400."

Since the year 1900 is not divisible by 400, then it\'s not a leap year.

Why the 400 year exception?  The earth revolves around the sun in 365.24219 days.  This was originally rounded off to 365.25, and every four years we have an extra day.  By using the 400 rule, we get the more accurate  365.2425 days.  Even though, this is still off.  In the year 10,000 AD, we will be 3 days off due to this rounding.  (Assuming we\'re still here, and we\'re still using the Gregorian calendar.)
Title: A real brainteaser... (for you vid)
Post by: Bobs_Hardware on February 09, 2002, 04:48:32 PM
bah, well, you learn something new every day (God. Damn. Smartass. :p)

it was just that "for example" that through me off, made it seem like he just used that year for no reason and youcould useany year  :confused: