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Based on my school maths and some other references I was [#permalink]
23 Aug 2007, 07:25
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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?
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.
Last edited by KillerSquirrel on 23 Aug 2007, 09:53, edited 2 times in total.