It would be best that you go through the GMAT practice test questions in the Study Guide first and then look at the videos for the questions that you might need help in.
Questions 201-204, pgs. 179-180
Questions 205-206, pg. 180
Questions 207-209, pgs. 180-181
Errata: Question #207
The answer should be C: 4
Given n = 4p
The possible even divisors of n are 2, 4, 2p and 4p
Questions 210-213, pg. 181
Questions 214-216, pg. 181
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