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Use Prime Factorization
Grade Level
GRE
QR.013 Use Prime Factorization
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Let n = 2
a
× 3
b
. The number n
2
has exactly 63 positive divisors, n is divisible by 2
4
× 3
3
, and n is not divisible by 2
5
. What is n?
A
2
4
× 3
3
B
2
4
× 3
4
C
2
3
× 3
4
D
2
5
× 3
3
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