How many different prime numbers are factors of the positive integer n?
[1] Four different prime numbers are factors of 2 n.
[2] Four different prime numbers are factors of n^2.
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prime numbers are factors
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sanju09
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Fiver
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How many different prime factors contribute to the form the positive integer n ?
St1] Four different prime numbers are factors of 2 n.
This means that the prime number 2 either could be a part of 'n' itself, yeilding 4 as the answer or could not be a part of 'n' yeilding 3 as the answer. Insuff.
St2] Four different prime numbers are factors of n^2.
If 4 different prime numbers make up n^2, then all 4 must be present in 'n' as well. Suff.
I pick B.
St1] Four different prime numbers are factors of 2 n.
This means that the prime number 2 either could be a part of 'n' itself, yeilding 4 as the answer or could not be a part of 'n' yeilding 3 as the answer. Insuff.
St2] Four different prime numbers are factors of n^2.
If 4 different prime numbers make up n^2, then all 4 must be present in 'n' as well. Suff.
I pick B.
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sanju09
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very good shot FiverFiver wrote:How many different prime factors contribute to the form the positive integer n ?
St1] Four different prime numbers are factors of 2 n.
This means that the prime number 2 either could be a part of 'n' itself, yeilding 4 as the answer or could not be a part of 'n' yeilding 3 as the answer. Insuff.
St2] Four different prime numbers are factors of n^2.
If 4 different prime numbers make up n^2, then all 4 must be present in 'n' as well. Suff.
I pick B.
The mind is everything. What you think you become. -Lord Buddha
Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
