Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#51 2009-02-02 16:34:45

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

Very good thinking, TheDude!
I shall wait for just a day before posting what I had in my mind;
since the reasons for each number being odd has been posted, you may post the next puzzle, TheDude!


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#52 2009-02-09 16:25:48

Jai Ganesh
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Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

#7. Germany, Indonesia, Mexico, Ghana.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#53 2009-02-11 05:00:02

JaneFairfax
Member
Registered: 2007-02-23
Posts: 6,868

Re: Odd many out

Mexico

Germany

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#54 2009-02-12 00:49:49

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

Both acceptable, JaneFairfax!


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#55 2009-02-14 17:28:05

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

Indonesia: The only 'Archipelago' among the four.

Ghana : The only country of the four through which the Greenwich Meridian passes.

#8. Copper, Silicon, Magnesium, Lead.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#56 2009-02-15 00:20:08

JaneFairfax
Member
Registered: 2007-02-23
Posts: 6,868

Re: Odd many out

Lead

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#57 2009-02-15 00:35:42

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

I agree. Funny reason, nevertheless, acceptable. I too had an odd reason in my mind for saying it is odd.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#58 2009-02-15 03:20:19

Muggleton
Member
Registered: 2009-01-15
Posts: 65

Re: Odd many out

Lead

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#59 2009-02-15 03:44:34

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

Muggleton,
The Lead given in the puzzle is the metal lead, not pencil lead!
This is what the wikipedia says about electrical conductivity of the metal:

Lead has a dull luster and is a dense, ductile, very soft, highly malleable, bluish-white metal that has poor electrical conductivity.


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#60 2009-02-15 03:52:00

Muggleton
Member
Registered: 2009-01-15
Posts: 65

Re: Odd many out

Oops, sorry. tongue

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#61 2009-03-04 10:54:36

JaneFairfax
Member
Registered: 2007-02-23
Posts: 6,868

Re: Odd many out

Copper

Last edited by JaneFairfax (2009-03-09 01:47:05)

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#62 2009-03-04 16:13:25

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

The reason for oddity is acceptable, JaneFairfax! A very good reason!
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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#63 2009-03-09 01:36:12

Jai Ganesh
Administrator
Registered: 2005-06-28
Posts: 48,420

Re: Odd many out

Since, you have given two reasons, JaneFairfax, I think it would be fair to ask you to post the next puzzle!


It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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