Given that p and q are distinct prime numbers, how many unique positive factors does possess?
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Tricky wording but good practice
Thankss
wait, why isn't it just 3? p, q, and... hmm I always mess up how many factors the exponents give you. anyone got a quick way to remember?
you add one to each exponent then multiply. p is basically p^1 so... yeah that's the trick
yesss the +1 thing. took me forever to stop forgetting it lol
got eight, felt pretty good about this one. the key is treating p as p^1
thanks, the exponent +1 method finally clicked for me here
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.