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01 Dec 2003, 07:45
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X is a positive integer. Is x prime?
a) x<5929
b) x is not divisible by any number <80
a) x<5929
b) x is not divisible by any number <80
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01 Dec 2003, 08:28
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don't we need anymore info on this?
anyway,
is X 5927? this is not divisible by numbers<80 ...there could be many, but this is what I came onto.
77^2 = 5929
I guess, C.
anyway,
is X 5927? this is not divisible by numbers<80 ...there could be many, but this is what I came onto.
77^2 = 5929
I guess, C.
01 Dec 2003, 08:56
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I'd say E.
(1) x can be many numbers. Either prime or non prime. No suff.
(2) What if x is divisible by any prime greater than 80 (i.e. 83, 89, etc.)? Not suff.
(combined) x can be any number equal to or greater than 166 (=83*2) and be divisible by at least one prime. Otherwise it can be one of many primes itself. Not clear so not suff.
(1) x can be many numbers. Either prime or non prime. No suff.
(2) What if x is divisible by any prime greater than 80 (i.e. 83, 89, etc.)? Not suff.
(combined) x can be any number equal to or greater than 166 (=83*2) and be divisible by at least one prime. Otherwise it can be one of many primes itself. Not clear so not suff.
