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The factors of 36 are:CITI29 wrote:For all integers p, f is the number of distinct factors of p that are divisible by 3 or 2. If p = 36, what is the value of f ?
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I thot the ans is 8, but it says 7..pls explain
Well, that's a non-official (or necessarily trustworthy) source, so there's a good chance that it's just wrong. Maybe the person who made up the question forgot to include 36.CITI29 wrote:Source- 'Gmat Math difficult questions'--file I downloaded from this forum
Not just a good chance- a 100% chance, at least on this question. The answer is 8, as described above. Or you can prime factorize: 36 = 2^2 * 3^2. and notice that 36 has 9 divisors (add one to the powers, and multiply: 3*3 = 9). All of these divisors will be divisible by 2 or 3 with the exception of 1, so the answer is 8.Stuart Kovinsky wrote:Well, that's a non-official (or necessarily trustworthy) source, so there's a good chance that it's just wrong.CITI29 wrote:Source- 'Gmat Math difficult questions'--file I downloaded from this forum
