Free Practice Question
PS · Problem Solving
505-555
Number Properties
The numbers in which of the following pairs do NOT have a pair of distinct prime divisors in common ?
Answer Choices
Correct answer marked belowA
10 and 20
B
12 and 18
24 and 32
Correct
D
21 and 63
E
22 and 88
See the full step-by-step explanation
You can see the correct answer above. Sign in for free to unlock the complete worked solution.
Track your performance and improve
Get detailed analytics, unlock full explanations, and move up difficulty tiers as you practice.
Explanation
Unlock the full explanation
Create a free account to reveal the correct answer, see the step-by-step explanation, and start tracking your GMAT progress.
Comments
Sign in to join the discussion
No comments yet
Be the first to share your thoughts and help others understand it better.
Sign in to commentWhat this question tests
What it tests
Your command of divisibility, primes, factors, parity, and how the GMAT tests properties of integers.
Common trap
Forgetting that 1 is not prime, that 0 is divisible by every integer, or that negative numbers flip your assumptions.
Details
Difficulty
505-555
Type
PS
Category