Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**zetafunc.****Guest**

DEs? Those are normally pretty easy... I am assuming there is some cruel twist to them.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

You should be able to go through those.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**zetafunc.****Guest**

Is there a PDF question?

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

Hold on please,

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**zetafunc.****Guest**

Okay

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

Nope, two expectation or expected value problems.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**zetafunc.****Guest**

Hmm, they are not my favourite but I'll give them a 2-minute skim to see if it is worth doing them -- but of course I will try to get the easy ones out the way first (DEs). The grade boundaries are:

S - 84/120

1 - 65/120

2 - 53/120

3 - 32/120

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

They do not look easy and there are parts.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

If I had to guess one of them is probably about transforming a DE into another using some obscure substitution, then the last part probably gives you a DE and expects you to use a similar substitution...?

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

The first question is the DE's They want you to solve one and it looks okay.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

The first question supposedly has a massive typo in it that resulted in lots of candidates losing time...

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

There is a strange part in it.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

I guess I will have to find out what it is when I do it...

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

Lots of people skipped it.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

You are reading the examiner reports?

I find some of them pretty funny but some also quite condescending, calling candidates pathetic and other things...

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

I am looking at the solutions to it.

Where are the examiner reports?

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

There should be a link saying 'Report' next to 'Solutions'.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

In the student room?

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

No, on the link I gave you.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

I got it now, I never noticed that.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

Some links might not work anymore though.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

That is okay, there are interesting comments in there. I am going to go offline for a bit I need some rest. See you later.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

Okay, see you later.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,482

Hi;

Sorry, just could not stay up any longer.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

That is OK, I am guilty of that too.

A bit annoyed at the moment -- started my STEP III 2012 mock and my sister came in my room and I had to do something for her which took about half an hour. No more exam conditions for this paper anymore...