Help with 5lb QA question

[radhika.agnihotri1]

[Leaderboard]

How to Ask Better GRE Questions on Forums

Since GregMat (who is a very chill person) doesn’t have any specific formatting rules when it comes to asking questions on the forums, I feel like there should at least be a reference text of some sort that can help people ask better questions and make the process more enjoyable for those who try to answer them. The Golden Rule: Imagine You’re Trying To Answer the Question Before you post your question about GRE preparation, practice questions, or strategies, try to put yourself in the shoes of…

[thapliyalantara31]

Is the answer one?

[dipank01]

Is the answer B) One? My solution is -

For &abc& to be prime, the possibilities are -

1. a and b are 0 and c=1, so &abc& becomes (2^0)(3^0)(5^1), so that &abc& = 5
2. a and c are 0 and b=1, so that &abc& = 3
3. b and c are 0 and a=1, so that &abc& = 2

However, since abc has to be a three-digit number a cannot be 0, leaving us with only the 3rd possibility.

[radhika.agnihotri1]

Yes, its B.