10 free GMAT practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
GMAT Practice Test 7Tutor mode
Question 1 of 10
Verbal Reasoning
High bacteria levels forced Rivermouth to close its public beaches on 31 days in 2023 but on only 9 days in 2025. Late in 2023, the city finished upgrading its storm sewers so that heavy rains no longer cause untreated runoff to overflow into the bay. City officials credit the upgrade with the reduction in closures.
Each of the following, if true, strengthens the officials' reasoning EXCEPT: