In May 2013 global levels of carbon dioxide in the atmosphere passed the milestone of 400 parts per million. This exercise will challenge your maths and help you understand why this is so important.

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Solution

Watch the video on Income Inequality then see if you can answer the questions.

Here is a great starter from Transum

http://www.transum.org/Software/SW/Starter_of_the_day/starter_April14.asp

Download a pdf worksheet here

Be systematic! What sort of numbers are important to help you solve this problem?

Here are two clear examples showing how to find the prime factors of a number.

How many triangles are in this shape? (A Transum starter)

Download a pdf worksheet here.

When you are absolutely sure you have counted them all, click here and press the yellow button to see if you are right.

This cube has 6 faces, 8 vertices (corners) and 12 edges.

This square based pyramid has 5 faces, 5 vertices and 8 edges.

See how quickly you can do this quiz from Purpose Games. Click start, then the computer will give you a number for either F (faces), V (Vertices) or E (Edges). You just have to click on the letter next to the right shape.

Do you know your prisms from your pyramids? See how quickly you can do this quiz from Purpose Games. Click start, then click on the shape whose name appears at the top.

Here is a great site to discover all about three dimensional shapes. Find some scissors and glue, print off some of these nets and see what you can make! http://www.korthalsaltes.com/cuadros.php?type=p

Inspirations
A mathematical masterpiece, imagining the workshop of M C Escher

To play this 2 player game from Transum you need to be able to calculate mean, median and range.

To do this quiz you need to understand the mean, mode, median and range.

Here are some probability questions from Transum. If you get one wrong use your back button on your browser and try again.

Number of players 2-4

Equipment. One pack of cards with picture cards removed.

Play

The black cards are positive numbers and the red cards are negative numbers. Ace is one. Each player is dealt 2 cards. Each player chooses whether to accept a third card from the dealer. The object is to make the total of the cards in your hand as close to zero as possible. The hand shown on the right is +7.

Each round the winner scores zero and losing players score the difference of their hand from zero. The pictured hand would score 7 points.

Play continues until one player reaches 50 points. The winner is the player with the least points.