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Comment on Maths made fun for GCSE School kids! by bhups101

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This is rare: encouraging children to play computer games but if they promote education, why not?!


Comment on A unique technique to teach geometry by clayturn

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That’s quite amusing, I’d quite like to sit a couple of her lectures now and see some of her pieces! I’ve allways found that the use of examples makes a topic easier to understand, and by the looks of things hers are very well made and presentable. I bet they work really well.

Comment on Children cocaine addicts! by dy14n

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Very interesting article, very shocking also.
I am quite intrigued at why so many underaged were checked fore cocaine.
Thanks for bringing this article to our attention

Comment on A unique technique to teach geometry by katierosew

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My Geometry and Visualisation lecturer (Katrin Leschke) said we could use knitting to show curves etc on 3d shapes … now I understand a bit better why she said this as I didn’t have time to explore!!

Comment on Makers Faire Video by clayturn

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That isn’t anywhere near how I imagined the faire to be, looked really fun! I hope you had a go at confusing the Rubiks Cube robot!

Comment on Maths Joke by dy14n

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Very amusing. (I’m trying to avoid the use of LOL or LMAO)

Comment on Is math pointless? by gelada

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This is a nice example. It is an excellent exercise to find the step where things break.

Comment on Is math pointless? by katierosew

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if a = b then in step 2 you are multipling by zero… but I can see how this looks true that a = b.
Look at this example whereby somebody tries to prove 2=1 in a similar fashion:

How would you prove that 2 = 1?
If a = b (so I say) [a = b]
And we multiply both sides by a
Then we’ll see that a2 [a2 = ab]
When with ab compared
Are the same. Remove b2. OK? [a2− b2 = ab − b2]

Both sides we will factorize. See?
Now each side contains a − b. [(a+b)(a − b) = b(a − b)]
We’ll divide through by a
Minus b and olé
a + b = b. Oh whoopee! [a + b = b]

But since I said a = b
b + b = b you’ll agree? [b + b = b]
So if b = 1
Then this sum I have done [1 + 1 = 1]
Proves that 2 = 1. Q.E.D.

Written by PeterW

(Just in case you’re wondering – the above proof is incorrect because in step 5, we divided by (a – b) which is 0 since a = b)

a2, b2 means a squared, b squared just to clarify

[http://www.onlinemathlearning.com/algebra-math-riddles.html]

So it is kinda like this but backwards :)


Comment on Is math pointless? by Daniel

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In this ‘proof’ the mistake is made when they have (a – t/2)^2 = (b – t/2)^2 and then take the liberty of ignoring the signs, and simply rooting.

For example, sure, it could be that in some cases a-(t/2) = b-(t/2) => a=b, which means that a-b=0, so we multiplied by 0 to begin with.

The other option is that a-(t/2)=-(b-(t/2)) => a-(t/2)=(t/2)-b => a+b=t, as we’d expect. (There are two more, but they’re just negative versions of the two cases that I stated, so the result is the same).

It’s clever, though.

Comment on Maths Joke by Alana

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This is brilliant and so true. I will share it with my Mathematician colleagues…I must.
Thanks for that!





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