How to answer every Even Odd, Primes, and LCMGCD Questions.
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Topics Covered

1Pitfalls in Even Odd Questions – Introduction
 1Pitfall 1 – Explanation, official examples, and Practice Questions
 2Pitfall 2 – Explanation, official examples, and Practice Questions
 3Pitfall 3 – Explanation, official examples, and Practice Questions


2Pitfalls in Primes
 1Pitfall 1 – Explanation, official examples, and Practice Questions
 2Pitfall 2 – Explanation, official examples, and Practice Questions
 3Pitfall 3 – Explanation, official examples, and Practice Questions


3Pitfalls in LCMGCD
 1Pitfall 1 – Explanation, official examples, and Practice Questions
 2Pitfall 2 – Explanation, official examples, and Practice Questions
 3Pitfall 3 – Explanation, official examples, and Practice Questions

Reader Reviews
Artem
GMAT 740 Scorer
I now understand who I can avoid so many mistakes by just following the systematic approach outlined by you.
Cristina
GMAT 730 Scorer
I now understand how I can use Prime factorization to break down complex expressions and solve the seemingly difficult DS questions.