A clock is an instrument to measure time which is shown in hours, minutes and seconds. Quarter of an hour = 60 ÷ 4 = 15 minutes. Half of an hour = 60 ÷ 2 = 30 minutes. 12 :00 o’clock in the night is 12:00 midnight. 12 :00 o’clock in the daytime is 12:00 noon. We do not write a.m. or p.m. with 12:00 o’clock time.. "/>
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