In Winter the pool is open from 11 am to 6 pm. How many hours is the pool open each day in the Winter?

• A. 5 hours
• B. 7 hours
• C. 6 hours
• D. 8 hours

Answer: (B)

Measuring time on a clock, the hours from 11:00 am to 6:00 pm total seven hours. Count 11 to 12 = 1 hour, then 12 to 6 = 6 hours, giving 1 + 6 = 7. Another way is to view 6 pm as 18:00 in 24-hour time, and 18 − 11 = 7 hours. The window from 11 to 6 is a 7-hour span.