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Cakes and Buns

Age 11 to 14 Short Challenge Level:

Helen buys some cakes and some buns for her party. Can you work out how many of each she buys?

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Calculating the Difference: A Discussion of the Use of Calculators in the English Primary Classroom.

Age 5 to 11

Clare Green looks at the role of the calculator in the teaching and learning of primary mathematics.

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Calculating with Cosines

Age 14 to 18 Challenge Level:

If I tell you two sides of a right-angled triangle, you can easily work out the third. But what if the angle between the two sides is not a right angle?

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Calculation 2000

Age 11 to 14 Short Challenge Level:

Weekly Problem 49 - 2013
What is the value of 2000 + 1999 × 2000?

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Calculator Bingo

Age 7 to 11 Challenge Level:

A game to be played against the computer, or in groups. Pick a 7-digit number. A random digit is generated. What must you subract to remove the digit from your number? the first to zero wins.

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Calculus Analogies

Age 16 to 18 Challenge Level:

Consider these analogies for helping to understand key concepts in calculus.

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Calculus Countdown

Age 16 to 18 Challenge Level:

Can you hit the target functions using a set of input functions and a little calculus and algebra?

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Calcunos

Age 7 to 11 Challenge Level:

If we had 16 light bars which digital numbers could we make? How will you know you've found them all?

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Calendar Activities

Age 5 to 7

Don't get rid of your old calendars! You can get a lot more mathematical mileage out of them before they are thrown away. These activities, using cut up dates from the calendar, provide numbers to. . . .

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Calendar Calculations

Age 7 to 11 Challenge Level:

Try adding together the dates of all the days in one week. Now multiply the first date by 7 and add 21. Can you explain what happens?

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Calendar Capers

Age 11 to 14 Challenge Level:

Choose any three by three square of dates on a calendar page...

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Calendar Cubes

Age 7 to 11 Challenge Level:

Make a pair of cubes that can be moved to show all the days of the month from the 1st to the 31st.

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Calendar Muddle

Age 3 to 5

The pictures on the timetable have been muddled up! Can you help put them back in order?

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Calendar Patterns

Age 7 to 11 Challenge Level:

In this section from a calendar, put a square box around the 1st, 2nd, 8th and 9th. Add all the pairs of numbers. What do you notice about the answers?

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Calendar Sorting

Age 7 to 11 Challenge Level:

The pages of my calendar have got mixed up. Can you sort them out?

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Calendars

Age 5 to 14

Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.

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Cambridge Maths Circle

Age 5 to 18 Challenge Level:

Problems used at the Cambridge Maths Circle.

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Cambridge Primary Maths Mapping Stage 1

Age 5 to 7

Cambridge Primary Maths Stage 1 activities.

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Cambridge Primary Maths Mapping Stage 2

Age 5 to 7

Cambridge Primary Maths Stage 2 activities.

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Cambridge Primary Maths Mapping Stage 3

Age 7 to 11

Cambridge Primary Maths Stage 3 activities.

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Cambridge Primary Maths Mapping Stage 4

Age 7 to 11

Cambridge Primary Maths Stage 4 activities.

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Cambridge Primary Maths Mapping Stage 5

Age 7 to 11

Cambridge Primary Maths Stage 5 activities.

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Cambridge Primary Maths Mapping Stage 6

Age 7 to 11

Cambridge Primary Maths Stage 6 activities.

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Cambridge Science Festival 2014

Age 11 to 16

Resources from Charlie's Science Festival sessions, March 2014

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Cambridge Science Festival 2015

Resources from Charlie's Science Festival session, March 2015

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Cambridge Science Festival 2018

Age 11 to 16

Resources from Charlie's Science Festival session, March 2018

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Can it Be

Age 16 to 18 Challenge Level:

When if ever do you get the right answer if you add two fractions by adding the numerators and adding the denominators?

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Can They Be Equal?

Age 11 to 14 Challenge Level:

Can you find rectangles where the value of the area is the same as the value of the perimeter?

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Can They Be Equal? Poster

Age 11 to 14 Challenge Level:

Can They Be Equal

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Can You Do it Too?

Age 5 to 7 Challenge Level:

Try some throwing activities and see whether you can throw something as far as the Olympic hammer or discus throwers.

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Can You Find ... Asymptote Edition

Age 16 to 18 Challenge Level:

Given a sketch of a curve with asymptotes, can you find an appropriate function?

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Can You Find ... Cubic Edition

Age 16 to 18 Challenge Level:

Can you find cubic functions which satisfy each condition?

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Can You Find ... Random Variable Edition

Age 16 to 18 Challenge Level:

Can you create random variables satisfying certain conditions?

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Can You Find a Perfect Number?

Age 7 to 14

Can you find any perfect numbers? Read this article to find out more...

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Can You Find... Asymptote Edition

Age 16 to 18 Challenge Level:

Can you work out the equation of the function from its graph?

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Can You Find... Cubic Curves

Age 16 to 18 Challenge Level:

Can you find equations for cubic curves that have specific features?

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Can You Find... Trigonometric Edition Part 2

Age 16 to 18 Challenge Level:

Can you find trig graphs to satisfy a variety of conditions?

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Can You Find... Trigonometry Edition

Age 16 to 18 Challenge Level:

What graphs can you make by transforming sine, cosine and tangent graphs?

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Can You Make 100?

Age 11 to 14 Challenge Level:

How many ways can you find to put in operation signs (+ - x ÷) to make 100?

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Can You Prove It?

Age 16 to 18 Challenge Level:

Here are a collection of statements to prove, to help you to practise writing out clear mathematical proofs.

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Can You Traverse It?

Age 14 to 18 Challenge Level:

How can you decide if a graph is traversable?

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Can't Find a Coin?

Age 11 to 14 Challenge Level:

Can you generate a set of random results? Can you fool the random simulator?

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Cancelling Fractions

Age 14 to 16 Short Challenge Level:

Can you find a fraction with the following properties?

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Candles

Age 14 to 16 Short Challenge Level:

What is the ratio of the lengths of the candles?

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Candy Floss

Age 14 to 16 Short Challenge Level:

What length of candy floss can Rita spin from her cylinder of sugar?

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Cannon Balls

Age 16 to 18 Short Challenge Level:

How high will a ball taking a million seconds to fall travel?

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Canny Fraction

Age 14 to 16 Short Challenge Level:

Weekly Problem 4 - 2012
What fraction of the volume of this can is filled with lemonade?

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Capture and Recapture

Age 11 to 16 Challenge Level:

How do scientists or mathematicians estimate the size of a population of wild animals?

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Car Journey

Age 7 to 11 Challenge Level:

This practical activity involves measuring length/distance.

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Carbon Footprints

Age 14 to 16 Challenge Level:

Is it really greener to go on the bus, or to buy local?