Solution: Find the largest multiple of 7 where $v^3 < 3500$. Test $v = 7$: $343 < 3500$. $v = 14$: $2744 < 3500$. $v = 21$: $9261 > 3500$. Maximum is 14. \boxed{14}

Wed, 22 Apr 2026 11:26:31 +0000

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