OT: Simple maths question

I heard this on a gameshow: "Answer quickly, what's half of 99?" - Allegedly most people say 44.5. Why? I said 49.5. I halve 100 then take another half off. Or you could halve 90 then add half of 9. Either way, how can people make this mistake?
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Because they can't do sums (it's not maths, it's arithmetic).
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legedly

her half

people

How do these people get by? I wonder if they all get short changed? Only the other week Aldi tried to give me ฃ10 less change than I should have got - although he did seem a bit confused, he was new there.

I'm not pedantic, I call them all maths.
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wrote:

They don't need to do mental arithmetic often enough to matter.

Unlikely when most flash their card and so there is no change.

More fool you for not using your card or phone.

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Another reason to use the self service checkout if paying cash. Or pay by card.
Very interesting that these 'genuine' mistakes at the checkout are almost always in favour of the store.
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*I went to school to become a wit, only got halfway through.

Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
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On Wednesday, 16 May 2018 10:35:09 UTC+1, Dave Plowman (News) wrote:

hould

I don't see it as another reason and not a reason at al really. Or pay by

I've not found that but then again I canlt remmeber the last time such a th ing happened.
But I did have a simialar feeling to the sainsbury guy on the murger with A DAS who was singing "I'm in the money" I got an emal from TFL. Oyster saying due to an error I have been overcharg e and will recieve ยฃ0.02 next time I check in with my Oyster card. Now if I'd been paying cash I would have noticed.
But I doubt you'd notice if they charged you ยฃ2 for a tins of beans at a automated checkout, would you.
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You don't mind getting short changed when paying cash, then?
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*Experience is something you don't get until just after you need it.*

Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
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On Wednesday, 16 May 2018 13:32:29 UTC+1, Dave Plowman (News) wrote:

If I use cash I know what my bill comes to and I give enough to get as litt le change as possible. Yesterday I handed over 3 pound coins two 10p pieces, 2 2p pieces and a 1p pices as I got my lunch at rhe students union as they now charged ยฃ3 .25 for a meal deal. I didn't need to count my change as I wasn't due any. AT the co-op when I d o use cash they have commented on the fact that I always have the correct c hange,m which I do. I kn ow how much I will spend and I have that in my poc ket in cash before I leave the office as I have a draw with loose change in it. Last week after clearing out last years projects I gained another 50p in 1 p pieces as a student had left 50ps worth with his project set out as 5 equ al weights of 1p stuck together with blu-tak.
I'm not a student I don't go there to buy a mars bar with a ยฃ20 note. infact one student came to me asking if he could get me something from the shop as he wanted to use his card and they don't accept cards unless you sp end ยฃ5 or more, so he got me a 500ml bottle of water and just gave it to me. So using his card cost him an extra quid or so, not something I'd choose to do.
If I do get change from the corner shop I usualy put the odd few p in the c harity tin rather than collect copper coins.
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a numeracy quiz if anyone is interested.
https://www.nnchallenge.org.uk/home/index.html
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On 16/05/2018 16:05, dennis@home wrote:

Quite interesting.
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Adam

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On 16/05/2018 10:32, Dave Plowman (News) wrote:

They probably aren't but how many when given ยฃ10 too much are going to make a fuss about it?
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ould

by

I just check my change, but I use self service anyway as it's faster, but not all supermarkets have those. My Asda does, but Morrisons only have them for people with mini baskets, and Aldi and Lidl don't have them at all.

ost

Or more likely the checkout worker. It seems to be a standard thing, not noticing you've given them a ฃ20. Some people actually say 20 out loud when they hand one over.
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On 5/15/2018 5:01 PM, Jimmy Wilkinson Knife wrote:

Many people are dumb. I took half a hundred and took off another half.
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Exactly what I did. I was surprised when John Richardson (the OCD and clever comedian) got it wrong, but then maybe that was staged.
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On 15/05/2018 22:01, Jimmy Wilkinson Knife wrote:

Half of 66 is 33; half of 88 is 44; half of 99 is...
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Max Demian

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For those who don't understand the difference between odd and even numbers that they should have been taught in year one of arithmetic.
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Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
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Four-and-half-ty, four and a half
--
Chris Green
ยท

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Exactly, which when added together make 49 and a half. I still can't think of how to make ther glaring error above.
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On 05/16/2018 11:43 AM, Jimmy Wilkinson Knife wrote:

What if you dropped the first .5 you came across, and forgot to pick it up.
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When doing maths in my head, I often forget numbers, but I know I've forgotten them and start again, much like when typing I can feel I've hit two keys or ther wrong key.
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