Company A's revenue increased by 10% in Q1, then decreased by 5% in Q2, and then increased by 20% in Q3, all relative to the *previous* quarter's revenue. If Company A's revenue at the start of Q1 was $500,000, what was its revenue at the end of Q3?

The correct answer to the question "Company A's revenue increased by 10% in Q1, then decreased by 5% in Q2, and then increased by 20% in Q3, all relative to the *previous* quarter's revenue. If Company A's revenue at the start of Q1 was $500,000, what was its revenue at the end of Q3?" is Option C: $633,600.

The other options — A) $550,000, B) $577,500, D) $696,960 — are incorrect for this GMAT Exam Prep question. As explained above: End of Q1: $500,000 * 1.10 = $550,000. End of Q2: $550,000 * 0.95 = $522,500. End of Q3: $522,500 * 1.20 = $627,000. Re-check calculation. $500,000 * 1.10 = $550,000. $550,000 * 0.95 = $522,500. $522…