The numbers in which of the following pairs do NOT have a pair of distinct prime divisors in common?
A. 10 and 20
B. 12 and 18
C. 24 and 32
D. 21 and 63
E. 22 and 88
[spoiler]OA=C[/spoiler]
Source: GMAT Paper Test
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The numbers in which of the following pairs do NOT have a
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Gmat_mission
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Ian Stewart
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32 = 2^5 has only one prime divisor, so it could never have a "pair" of distinct prime divisors in common with any other number. So the answer is C.
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Scott@TargetTestPrep
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We see that 10 and 20 have prime factors 5 and 2 in common, and 12 and 18 have prime factors 2 and 3 in common, but 24 and 32 have only a 2 in common, so they do not have a pair of distinct prime factors in common.Gmat_mission wrote:The numbers in which of the following pairs do NOT have a pair of distinct prime divisors in common?
A. 10 and 20
B. 12 and 18
C. 24 and 32
D. 21 and 63
E. 22 and 88
[spoiler]OA=C[/spoiler]
Source: GMAT Paper Test
Answer: C
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