Clock

Puzzles

• adjacent.ticksAt what times of day is the hour hand of a clock pointing precisely at a minute tick-mark and the minute... New
• christmas.dayProve that the probability that Christmas in a random year will fall on a Wednesday is not 1/7. New
• day.of.weekIt's restful sitting in Tom's cosy den, talking quietly and sipping a glass of his Madeira.
• overlapHow many times per day do a clock's hands overlap?
• palindromicHow many times per day does a digital clock display a palindromic number?
• reversibleHow many times per day can the hour and minute hands on an analog clock switch roles and still signify a...
• right.angleHow many times per day do the hour and minute hands of a clock form a right angle?
• swapped.handsA school clock is showing the wrong time, but the teacher says, "It's wrong now, but it is right 11 times a... New
• thanksgivingHow can you figure out the date of Thanksgiving for any given year? New
• thirdsDo the 3 hands on a clock ever divide the face of the clock into 3 equal segments, i.e.