Latika delivers bottled water. She delivers to bookstore A every 6th day and to bookstore B every 9th day. If she delivers to both stores on Thursday the 4th, how many days after that will she deliver to both stores on the same day again?

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• A 12 days
• B 15 days
• C 18 days
• D 20 days

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Answer: C. 18 days

Answer: C) 18 days
Explanation: To find when both events happen simultaneously again, find the Least Common Multiple (LCM) of 6 and 9. The LCM of 6 and 9 is 18.

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