Consider two different prime numbers, p and q. Which of the following represents a possible product of p and q?
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Thanks for sharingThank you for sharing!!thanks for sharing
Thankss
Wait, I'm confused... 15 = 3 x 5, so both are prime. But isn't 8 also possible? 8 = 2 x 4 and 4 isn't prime... oh never mind lol
no 8 can't work since one factor has to be 4. 15 is the only one that splits into two different primes 👍
thanks this was easy but I almost picked 13 because I forgot 13 is itself prime, not a product. good reminder to read the question
Is 15 the only one?? what about 36 = 4x9... nope neither is prime. ok got it, answer is 15
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.