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40+40x0+1 ?

539 replies

minimuffy · 09/11/2011 19:48

40 + 40 x 0 + 1 =

A- 1
B- 41
c- 0

I say its B-41 as you need to multiply then add. (from what i remember of standard grade maths the acroymym BOMDAS- brackets off, multiply, divide, add, subtract)

DH says its 1.

please tell he's wrong!

OP posts:
jjkm · 11/11/2011 23:31

This reply has been deleted

Message withdrawn at poster's request.

schnitzelvoncrumm · 12/11/2011 08:06

No I have a better one:

Mathematician 1: I have the most excellent anagram of Banach Tarski
Mathematician 2: What is it?
Mathematician 1: Banach Tarski Banach Tarski

noblegiraffe · 12/11/2011 10:57

What does the B stand for in Benoit B Mandelbrot?

It stands for Benoit B Mandelbrot.

Thumbwitch · 12/11/2011 11:02

OK, the Banach Tarski one I could sort of understand but that one, noblegiraffe, I don't get at all. Could you elaborate for us lesser mortals?

Changebagsandgladrags · 12/11/2011 11:19

Oh I get that one, it's fractals isn't it? B keeps getting replaced by Benoit B Mandelbrot...

noblegiraffe · 12/11/2011 11:24

Yes, Mandelbrot invented fractals. A fractal is something where if you zoom in and look at a bit of it, it looks the same as the original fractal.

Like the coastline of Britain goes in and out, all jaggedy. If you zoom in on a bit on Google maps it still goes in and out and looks jaggedy. If you keep zooming in it looks the same, you can't tell if you're looking at a big bit of coastline or a small bit.

So you look at the B in Benoit B Mandelbrot and it stands for Benoit B Mandelbrot, which has a B you can look at etc etc.

Thumbwitch · 12/11/2011 11:34

Fractals, yes I knew that he was the fractal man but it still needed explaining. Gah!
Thank you.

LeBOF · 12/11/2011 11:36

3 nuns go to a shop to buy a tv that costs £30. They all pay an equal share of £10 each. The manager realises it should only have cost £25 and, fearful of divine retribution, he tells the sales assistant to refund them £5. The assistant decides that you cannot share £5 equally between 3 people so keeps £2 for himself to buy lunch and finds the 3 nuns browsing in the gaming section and gives them the remaining £3. That means the nuns have paid £9 each for the tv which makes the tv £27 and the shop assistant has £2. £27 + £2 = £29. But where did the other £1 go?

Thumbwitch · 12/11/2011 11:47

I'm sure there's a logical mis-step in that, leBOF but I can't think straight enough to work it out while I'm watching CSI!

Seona1973 · 12/11/2011 11:49

thats making my brain hurt just trying to work it out!

Hicidycup · 12/11/2011 11:50

Hummmm? Confused

nickelbabe · 12/11/2011 11:55

no, it works.
Grin

that's why it's so confusing!

SherbetDibDab · 12/11/2011 11:56

The £27 includes the £2 the shop assistant has pocketed. The shop only got £25.

So adding the £2 back onto the £27, actually makes no sense.

So there's actually £3 missing and we already know the nuns have that.

RustyBear · 12/11/2011 11:57

The misstep is the 'that makes the TV £27' It doesn't, the TV + the assistant's lunch = £27, and the nuns have paid for both, they just don't realise it. But God does, so the divine retribution will fall on the assistant. the sandwich he buys for lunch will probably have salmonella.... Grin

nickelbabe · 12/11/2011 11:58

exactly.
but the way the puzzle is done, they add the £2 onto the £27 because it's been done backwards.
the puzzle makes the assumption that because the £3 has gone to the nuns, that they have paid £27 for the tv, which is correct, but as you say, the £2 didn't go to the shop.

Thumbwitch · 12/11/2011 12:00

Thanks Rusty and Sherbert :)

LeBOF · 12/11/2011 12:03

Grin at the salmonella

JugglingWithGoldandMyrhh · 12/11/2011 12:05

Haven't read the whole thread ( Blimey 19 pages ! ) But just thinking it's crying out for brackets really isn't it ?
What sort of problem could it represent anyway ?
As a teacher (though not of maths especially) I'd say it's only purpose would be to badly illustrate why brackets are needed. Smile
If BOMDAS is right OP then so are you. So it's probably 41.

Hicidycup · 12/11/2011 12:11

I live riddles Grin

JugglingWithGoldandMyrhh · 12/11/2011 12:12

Those nuns are really making my head hurt Hmm Smile
What do they want with a new telly anyway ?!
I'm sure the shop assistant is up to no good and upsetting the apple cart !

LeBOF · 12/11/2011 12:16

How can you add eight 8's to get the number 1,000? (only using addition)

nickelbabe · 12/11/2011 12:17

is that a binary question?

LeBOF · 12/11/2011 12:19

Ummm, dunno. What do you think?

nickelbabe · 12/11/2011 12:25

I don't like riddles.

SoupDragon · 12/11/2011 12:26

I know! I know!