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Based on my school maths and some other references I was

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Senior Manager
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Based on my school maths and some other references I was [#permalink] New post 23 Aug 2007, 07:25
Based on my school maths and some other references I was always of the opinion that 1 is NOT a prime number. But recently I saw an explanation in the OG 11th edition which said that 1 is a prime number. I need to look up the problem number so I can prove it... I will do so later today.

Is this one of those GMAt thinggies where they stick to one particular rule, the reality be damned? Or is 1 really a prime number?
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 [#permalink] New post 23 Aug 2007, 07:48
One is not a prime number.

A quote from OG 11 states (page 108) - " A prime number is a positive integer that has exactly two different positive divisor, 1 and itself. The number 1 is not a prime number since it has only one positive divisor.

:-D

Last edited by KillerSquirrel on 23 Aug 2007, 09:53, edited 2 times in total.
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 [#permalink] New post 23 Aug 2007, 07:56
I will post the question number in the evening. I made a note specifically on the scratch paper I was using, but I forgot to note down the question number.
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 [#permalink] New post 23 Aug 2007, 09:53
See my edited post

:-D
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 [#permalink] New post 23 Aug 2007, 10:24
prime numbers

2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,etc

memorize those
  [#permalink] 23 Aug 2007, 10:24
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Based on my school maths and some other references I was

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