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 Post subject: CodesPosted: Wed Jun 25, 2014 2:45 pm

Joined: Mon Mar 08, 2010 1:03 pm
Posts: 1413
Could someone help me with this question, PLEASE! I want to give this to DS this evening, but I can't figure it out.

The code for ABACUS is ZZXYPM. What is the word for ZAZAYY?

But WHY?!

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 Post subject: Re: CodesPosted: Wed Jun 25, 2014 2:59 pm

Joined: Tue Dec 18, 2012 10:59 am
Posts: 3579
The numerical position of the letter in the word allocates the moves backward/forward needed to find the code letter from the alphabet. In this case backwards is easiest.

123445
Abacus
Zzxy......etc

So:
A - 1=z
B - 2=z
A - 3=x.
C - 4=y

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 Post subject: Re: CodesPosted: Wed Jun 25, 2014 3:07 pm

Joined: Tue Jul 21, 2009 9:56 pm
Posts: 8545
Why on earth this is verbal reasoning I don't know, but this is the answer:

A - 1 = Z

B - 2 = Z

A - 3 = X

C - 4 = Y

U - 5 = P

S - 6 = M

So to decode you do it the other way round - for each letter in the code you move forwards in the alphabet - 1 letter for the first letter, 2 letters for the second letter etc

No way I would fathom that out for the first time in 30 seconds in an exam though. Poor children.

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 Post subject: Re: CodesPosted: Wed Jun 25, 2014 4:58 pm

Joined: Mon Mar 08, 2010 1:03 pm
Posts: 1413
I feel such a clot. I forgot you had to do the opposite from the code to the word. And I should be pleased that DS saw it; but I feel very stupid.

This was a 15 mins test though and he did it in 25ish. He got 85% though (I feel VERY up and down with these tests; can you tell?!) He is tired. I'm hoping that's why and he'll speed up on the day ...

Thanks SB3 and Mystery.

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 Post subject: Re: CodesPosted: Thu Jun 26, 2014 7:48 am

Joined: Mon Mar 12, 2007 11:49 am
Posts: 452
Does this help?

viewtopic.php?f=3&t=25468&hilit=codes+bottom

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 Post subject: Re: CodesPosted: Thu Jun 26, 2014 7:54 am

Joined: Mon Mar 08, 2010 1:03 pm
Posts: 1413
Thank you Y! I have printed all 11 pages of it and will study it for tips!

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 Post subject: Re: CodesPosted: Thu Jun 26, 2014 9:49 am

Joined: Sat Dec 28, 2013 3:52 pm
Posts: 853
fatbananas wrote:
I feel such a clot. I forgot you had to do the opposite from the code to the word. And I should be pleased that DS saw it; but I feel very stupid.

This was a 15 mins test though and he did it in 25ish. He got 85% though (I feel VERY up and down with these tests; can you tell?!) He is tired. I'm hoping that's why and he'll speed up on the day ...

Thanks SB3 and Mystery.

FB, I wouldn't worry much about time. With practice they will pick up time and when they do it in exam hall they are more focussed as opposed to doing it at home so they will gain on time. I think accuracy should be the preference now which your DS is achieving. IMO, 85% is good score. Your boy deserves a biscuit/playstation time( whatever he likes).

ps. I was thinking of putting together a marks table listing: month, publication and percentage score. Just to see how the average score is progressing over time.

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 Post subject: Re: CodesPosted: Thu Jun 26, 2014 1:20 pm

Joined: Mon May 16, 2011 1:05 pm
Posts: 4882
This was my DDs least favourite type of question. She could do them but they took absolutely ages.

You can only speed up to a certain extent. We decided hat the best thing would be to leave them until the end and do questions that took less time first. She practised hem a bit to improve speed and accuracy. The important thing to know is they tend to be guaranteed marks as long as they see the pattern and with practise they should.

Then the other thing DD decided to do was not to necessarily do them in the order given. (Forgive me if I explain this badly, it's been a while)
Firstly she tackled all the codes that went one way, then all he ones that went the other, so the brain isn't trying to flip from one to the other. This made a big difference.

Luck on the day, they didn't come up.

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 Post subject: Re: CodesPosted: Thu Jun 26, 2014 1:29 pm

Joined: Mon Mar 08, 2010 1:03 pm
Posts: 1413
Those are all useful tactics, Tinkers. Thank you

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