Other tags that relate to Dotty Relationship
Squares. Practical Activity. Ruler. Time. Visualising. Interactivities. Coordinates. Angle properties of polygons. Famous mathematicians. Angles - points, lines and parallel lines.There are 71 results
Broad Topics > Measuring and calculating with units > Time
Sweeping Hands
Age 7 to 11 Challenge Level:
Use your knowledge of angles to work out how many degrees the hour and minute hands of a clock travel through in different amounts of time.
Making Maths: Make a Pendulum
Age 7 to 14 Challenge Level:
Galileo, a famous inventor who lived about 400 years ago, came up with an idea similar to this for making a time measuring instrument. Can you turn your pendulum into an accurate minute timer?
A Child Is Full of ...
Age 7 to 11 Short Challenge Level:
My cousin was 24 years old on Friday April 5th in 1974. On what day of the week was she born?
Right Time
Age 11 to 14 Challenge Level:
At the time of writing the hour and minute hands of my clock are at right angles. How long will it be before they are at right angles again?
Take the Right Angle
Age 7 to 11 Challenge Level:
How many times in twelve hours do the hands of a clock form a right angle? Use the interactivity to check your answers.
Digital Times
Age 11 to 14 Challenge Level:
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?
Take Your Dog for a Walk
Age 7 to 11 Challenge Level:
Use the interactivity to move Mr Pearson and his dog. Can you move him so that the graph shows a curve?
Hello Again
Age 11 to 14 Challenge Level:
Anne completes a circuit around a circular track in 40 seconds. Brenda runs in the opposite direction and meets Anne every 15 seconds. How long does it take Brenda to run around the track?
5 on the Clock
Age 7 to 11 Challenge Level:
On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?
Crossing the Atlantic
Age 11 to 14 Challenge Level:
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?
John's Train Is on Time
Age 11 to 14 Challenge Level:
A train leaves on time. After it has gone 8 miles (at 33mph) the driver looks at his watch and sees that the hour hand is exactly over the minute hand. When did the train leave the station?
Home Time
Age 7 to 11 Challenge Level:
Alice's mum needs to go to each child's house just once and then back home again. How many different routes are there? Use the information to find out how long each road is on the route she took.
You Tell the Story
Age 7 to 11 Challenge Level:
Can you create a story that would describe the movement of the man shown on these graphs? Use the interactivity to try out our ideas.
Decimal Time
Age 11 to 14 Challenge Level:
Use the clocks to investigate French decimal time in this problem. Can you see how this time system worked?
On Time?
Age 5 to 14
This article explains how Greenwich Mean Time was established and in fact, why Greenwich in London was chosen as the standard.
Do You Measure Up?
Age 7 to 11 Challenge Level:
A game for two or more players that uses a knowledge of measuring tools. Spin the spinner and identify which jobs can be done with the measuring tool shown.
Two Clocks
Age 7 to 11 Challenge Level:
These clocks have only one hand, but can you work out what time they are showing from the information?
A Brief History of Time Measurement
Age 11 to 18
Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.
An Unhappy End
Age 11 to 14 Challenge Level:
Two engines, at opposite ends of a single track railway line, set off towards one another just as a fly, sitting on the front of one of the engines, sets off flying along the railway line...
Buses
Age 11 to 14 Challenge Level:
A bus route has a total duration of 40 minutes. Every 10 minutes, two buses set out, one from each end. How many buses will one bus meet on its way from one end to the other end?
The Time Is ...
Age 7 to 11 Challenge Level:
Can you put these mixed-up times in order? You could arrange them in a circle.
What Is the Time?
Age 5 to 11 Challenge Level:
Can you put these times on the clocks in order? You might like to arrange them in a circle.
Order the Changes
Age 7 to 11 Challenge Level:
Can you order pictures of the development of a frog from frogspawn and of a bean seed growing into a plant?
Calendar Sorting
Age 7 to 11 Challenge Level:
The pages of my calendar have got mixed up. Can you sort them out?
Slow Coach
Age 7 to 11 Challenge Level:
How many of this company's coaches travelling in the opposite direction does the 10 am coach from Alphaton pass before reaching Betaville?
How Long Does it Take?
Age 7 to 11 Challenge Level:
In this matching game, you have to decide how long different events take.
Paradoxes
Age 7 to 14
A paradox is a statement that seems to be both untrue and true at the same time. This article looks at a few examples and challenges you to investigate them for yourself.
Clock Hands
Age 7 to 11 Challenge Level:
This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.
Palindromic Date
Age 7 to 11 Challenge Level:
What is the date in February 2002 where the 8 digits are palindromic if the date is written in the British way?
Ten Green Bottles
Age 7 to 11 Challenge Level:
Do you know the rhyme about ten green bottles hanging on a wall? If the first bottle fell at ten past five and the others fell down at 5 minute intervals, what time would the last bottle fall down?
How Many Times?
Age 7 to 11 Challenge Level:
On a digital 24 hour clock, at certain times, all the digits are consecutive. How many times like this are there between midnight and 7 a.m.?
Train Timetable
Age 7 to 11 Challenge Level:
Use the information to work out the timetable for the three trains travelling between City station and Farmland station.
Walk and Ride
Age 7 to 14 Challenge Level:
How far have these students walked by the time the teacher's car reaches them after their bus broke down?
Wonky Watches
Age 7 to 11 Challenge Level:
Stuart's watch loses two minutes every hour. Adam's watch gains one minute every hour. Use the information to work out what time (the real time) they arrived at the airport.
Order, Order!
Age 5 to 11 Challenge Level:
Can you place these quantities in order from smallest to largest?
Place Your Orders
Age 11 to 14 Challenge Level:
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
Lengthy Journeys
Age 7 to 11 Challenge Level:
Investigate the different distances of these car journeys and find out how long they take.
In Order
Age 7 to 11 Challenge Level:
Can you rank these quantities in order? You may need to find out extra information or perform some experiments to justify your rankings.
Now and Then
Age 7 to 11 Challenge Level:
Look at the changes in results on some of the athletics track events at the Olympic Games in 1908 and 1948. Compare the results for 2012.
Working with Dinosaurs
Age 7 to 11
This article for teachers suggests ways in which dinosaurs can be a great context for discussing measurement.
Hands Together
Age 11 to 14 Challenge Level:
Sometime during every hour the minute hand lies directly above the hour hand. At what time between 4 and 5 o'clock does this happen?
Eclipses of the Sun
Age 7 to 14
Mathematics has allowed us now to measure lots of things about eclipses and so calculate exactly when they will happen, where they can be seen from, and what they will look like.
Being Curious - Primary Measures
Age 5 to 11 Challenge Level:
Measure problems for inquiring primary learners.
Being Collaborative - Primary Measures
Age 5 to 11 Challenge Level:
Measure problems for primary learners to work on with others.
Being Resourceful - Primary Measures
Age 5 to 11 Challenge Level:
Measure problems at primary level that require careful consideration.
On What Day Did it Happen?
Age 5 to 14
Read this article to find out the mathematical method for working out what day of the week each particular date fell on back as far as 1700.
Being Resilient - Primary Measures
Age 5 to 11 Challenge Level:
Measure problems at primary level that may require resilience.
Clocking Off
Age 7 to 16 Challenge Level:
I found these clocks in the Arts Centre at the University of Warwick intriguing - do they really need four clocks and what times would be ambiguous with only two or three of them?
NRICH is part of the family of activities in the Millennium Mathematics Project.