The Clock with Hands at Ninety Degrees Apart

		Question During a twenty four hour period; how often are the minute and hour hands of a clock exactly 90 degrees apart ? Answer For every hour there must be a position where the minute hand is exactly 90 degrees ahead ( clockwise ) of the hour hand and there must also be another position where the minute hand is behind ( anti-clockwise) the hour hand. With two possible positions per hour and with 24 hours per day the number of positions per day the answer is ... 48
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First published sometime before Sunday the 12th of February, 2000 Last upload was on Tuesday the 23rd of September, 2003 at 18:26:19