English, Maths and Date Shift Cipher…

Things have been getting really hard this week on the maths and Eniglish front, So I thought that I’d share one of each for those of you who want to give them a try.  First the English…ADVERBS!!!!!!!!!

Select all the adverbs in the following sentence:

Piper left the supermarket rather quickly and soon realised that she had foolishly forgotten her purse.

Can you get all the adverbs?  And now…my maths, it was really hard and I think that you really should have a go at it!

There are 6 worms, they measure: 3 cms, 3 cms, 1 1/5 cms, 2 1/5 cms, 2 1/5 cms and 1 1/5 cms.  What is the average length of one worm?

Today I decided that I would share one of my codes that I have on a Word Document.  It’s called the Date Shift Cipher, and I learned how to do it from Aurora Lipper, who is a science teacher, a NASA ex-rocket scientist and the woman who I learn science from over the computer.  This is a really easy code that unless you know the date you can’t decipher.  This is how you do it:

First pick a date, say 12 May 2016.  Change the date into short form, 12/05/16.  Then remove all the slashes and write all the numbers together like this: 120516.  This is your shift key, this is how you use it:

Take a sentence to code, mine will be ‘Hello, my name is Emily.’

Put the numbers under the words.  So under ‘Hello,’ you would put ‘12051’, under ‘my’ you would put ’61’, under ‘name’ you would put ‘2051’, under ‘is’ there would be ’61’ and under ‘Emily’ there would be ‘20516’.  Next, you come to the slightly harder part, the code making.  To do this you will need to start with the letter of the first word and made it however many times along in the alphabet that the number below in says to.  For the first letter, H, you move it along 1, this means that it will now be the letter I.  For the second letter, e, you move it along twice, now the letter is g.  If the letter that you are decoding is at the end of the alphabet, then you will have to go back to the start of the alphabet and continue counting from there.

In the end, my code would look something like this: Iglqp, sz parf ot Gmnme.

To decode your message, put the numbers under the words again and instead of going forwards this time, you go backwards.  This means that you would put the same numbers under the message, then you go back one from I and so on until your message says ‘Hello, my name is Emily.’

I really hope that that make some sense, it would be a really good code to learn, so you can send messages to your friends in class if they have the date!

This is the answer to the English, and below it is how to work out the maths…

The four adverbs were…rather, quickly, soon and foolishly.

This is how you do the maths:

  1. Add up the lengths of the worms, your total should be 12 4/5.
  2. Now describe your whole number in terms of a fraction, and then turn it into the corresponding number of fifths.  So:

12 4/5 = 12/1 +4/5           12/1 x 5/5 +4/5 = 60/5 + 4/5 = 64/5

3. Now divide that number, 64/5, by six to find the average.  So:

64/5 ÷ 6 = 64/5 ÷ 6/1 = 64/5 x 1/6 = 64/30

4. Now simplify this number, 64/30 into it’s whole number and remaining fraction.  So:

64/30 = 2 4/30 simplified into 2 2/15.  This is the average length of one worm.  Simple, eh?

See ya…

Emily

 

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