GMAT sentence correction tips

Sentence correction faux pas by JOHN JOVI

What errors do the sentence correction questions present?

Subject- verb agreement, pronoun error, tense error, misplaced modifier, preposition error, faulty comparison ...
I am very comfortable with Subject-Verb-Agreement

Let me show you
Eg.  one of the countries participating in the SAARC meet is Indonesia.
Indonesia is one of several countries that is participating in the SAARC meet.

PS; John Jovi, you are right in the first, but wrong in the second…

Here’s the correct sentence:
 Indonesia is one of several countries that are participating in the SAARC meet.