Time

There are 102 NRICH Mathematical resources connected to Time
Palindromic Date
problem

Palindromic Date

Age
7 to 11
Challenge level
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What is the date in February 2002 where the 8 digits are palindromic if the date is written in the British way?
Millennium Man
problem

Millennium Man

Age
7 to 11
Challenge level
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Liitle Millennium Man was born on Saturday 1st January 2000 and he will retire on the first Saturday 1st January that occurs after his 60th birthday. How old will he be when he retires?
Hike and Hitch
problem

Hike and Hitch

Age
14 to 16
Challenge level
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Fifteen students had to travel 60 miles. They could use a car, which could only carry 5 students. As the car left with the first 5 (at 40 miles per hour), the remaining 10 commenced hiking along the road (at 4 miles per hour)...
Hand Swap
problem

Hand Swap

Age
14 to 16
Challenge level
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My train left London between 6 a.m. and 7 a.m. and arrived in Paris between 9 a.m. and 10 a.m. At the start and end of the journey the hands on my watch were in exactly the same positions but the minute hand and hour hand had swopped places. What time did the train leave London and how long did the journey take?
Timing
problem

Timing

Age
7 to 11
Challenge level
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These two challenges will test your time-keeping!
Friday 13th
problem

Friday 13th

Age
11 to 14
Challenge level
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Can you explain why every year must contain at least one Friday the thirteenth?
On Time
problem

On Time

Age
11 to 14
Challenge level
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On a clock the three hands - the second, minute and hour hands - are on the same axis. How often in a 24 hour day will the second hand be parallel to either of the two other hands?
Crossing the Atlantic
problem

Crossing the Atlantic

Age
11 to 14
Challenge level
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Every day at noon a boat leaves Le Havre for New York while another boat leaves New York for Le Havre. The ocean crossing takes seven days. How many boats will each boat cross during their journey?
A Child is Full of ...
problem

A Child is Full of ...

Age
7 to 11
Challenge level
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My cousin was 24 years old on Friday April 5th in 1974. On what day of the week was she born?
Digital Times
problem

Digital Times

Age
11 to 14
Challenge level
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Which segment on a digital clock is lit most each day? Which segment is lit least? Does it make any difference if it is set to 12 hours or 24 hours?