PURPOSE: A clock for indicating twenty five hours is provided, which enables a user to use much time by counting a minute as 100 seconds, an hour as 100 minutes, and a day as 25 hours. CONSTITUTION: A clock for indicating twenty five hours includes a driving portion(230), a second hand portion(120), a minute hand portion(130), an hour hand portion(140), and a display portion. The driving portion provides the prime power for counting hours. The second hand portion is connected to the driving portion in order to count 100 seconds. The minute hand portion is connected to the driving portion in order to count 1 minute every 100 seconds. The hour hand portion is connected to the driving portion in order to count 1 hour every 100 minutes. The hour hand portion counts 25 hours a day. The display portion displays counting states of the second hand portion, the minute hand portion, and the hour hand portion.
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