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EddieM
No, he got it in by hand, how, I don't know, needless to say we couldn't get it out again.
My ze high
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No, he got it in by hand, how, I don't know, needless to say we couldn't get it out again.
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And they were both the same size?
That doesn't make any sense
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EddieM
What? socket and plug? If so yes, it's impossible right? but he managed it.
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True, but I'm not sure how 'PC' (even 'legal'), let alone fair or reasonable, to describe people who have genuine problems with grasping mathematical concepts as being either "stupid" or "idiots".
Given that such people exist, whilst complete 'xxx-proofness' is obviously not possible, one can at least do what one can to minimise issues resulting from the fact that some people do have this problem (which some might call a 'disability'). For example, on the basis of my experience, whilst I could not have quantified the problem for them, I could have told these purveyors of burgers that the 'first impression' ('intuitive', albeit incorrect!) of an 'appreciable' proportion of people would be that a 1/3 lb burger was smaller than a 1/4 lb one!
However, even for those who 'understand' the maths, there is, in practice, another level of complication resulting from the psychology of perception. For example, although it has been the subject of an awful lot of research, and therefore presumably must be at least partially true, I find it quite surprising that (seemingly 'for ever'**) marketeers have believed that, despite all the 9s, a price of, say, £499.99 is perceived as being significantly less than £500.00.
[** even if you look back at adverts from the 19th or early 20th century, you will see lots of goods on offer for prices like "£2 19s 11¾d" ]
Kind Regards, John
30ma and 100ma always fool meDon't panic - you didn't (get it wrong)
Maths is a strange subject, in that a good few people seem to have problems in understanding concepts which others regard as "simple, basic and 'obvious' ". If I understand the OP's problem correctly, it's not all that uncommon, and tends to arise in those who would read/pronounce 0.12 and 0.8 as "nought point twelve" and "nought point 8" respectively.
As someone said early on, things usually become clearer to some people if one describes both numbers in terms of the same number of decimal places - they would then become 0.12 and 0.80, which might be verbalised as "nought point twelve" and "nought point eighty" - which would make the relative sizes more obvious.
Kind Regards, John
I don't think I can help you with that one unless you can help me understand what it is about them which 'fools' you - since you obviously must understand the difference between "30" and "100"!
Kind Regards, John
Its when it goes subZero
30ma and 100ma ,which trips first, 0.030A or 0.100A, something so simple but gets me everytime
I've just finished a Zoom meeting where I mentioned this. One of the others reckons it's not unknown with high density [such as 15pin VGA] where only one pin doesn't have a place to go.
2 issues:
The all plastic sockets, moulding is not always made to the same standard shape as they should be sometimes the wide corners are not as wide as they should be.
With metal sockets, if both of the fixing posts are missing sometimes the metal part comes off making the socket narrower.
I've heard an explanation that this started with shopkeepers when mechanical tills were introduced to stop assistants pocketing customers payments, this way the till could be heard to open to get the change.
Fair enough - although that is not 'sub-zero' (which would mean 'negative') but, rather, 'sub-1' or 'subb-unity' (i.e. 'less than 1').
That being the case, it's essentially the same as the issue which started all this (0.12 vs 0.8). It's certainly true, probably for all of us, that things are simpler (hence 'more immediately obvious') with integers (whole numbers), rather than 'fractions' (whether decimal fractions or otherwise) - hence 30 mA and 100 mA are generally preferable to 0.03 A and 0.1 A.
Furthermore, sticking with integers is much 'safer', particularly when the bit to the left of the decimal point is something other than zero, since decimal points can sometimes be overlooked, or not 'seen to be in the right place'. That is one reason why, for example, modern practice with drug doses is avoid fractions (decimal or otherwise) wherever possible - there have been occasions in the past when, say, "1.2 g" has been misread as "12 g" (or vice versa), an error much less likely to occur if the former dose is expressed as 1,200 mg.
EFLI might say that we should stick with decimal fractions (for doses) and teach people how to 'read them properly'. However, human being make mistakes so, particularly when lives may be at stake, it makes sense to do things which minimises the possibility of such mistakes (even if they are 'stupid' or 'idiotic').
Kind Regards, John
I suppose a credible story at the time, but not really still applicable - yet, if you look anywhere today, you'll find an incredible number of products priced at just one pence (or, in the case of large items, like cars and houses, just one pound) under a 'very round number' !
Kind Regards, John
One of the structural problems with maths education is that if you're successful at maths, you'll maybe go on to do maths O' levels (showing my age there!) A levels, possibly a degree and then train as a maths teacher - you therefore have little idea or understanding whatsoever what it's like not to be good at maths, what it's like not to 'get it' and may therefore be a fairly rubbish maths teacher for most people.
I like to think I was a reasonably good maths teacher for the very short period of time I was one - my favourite quote from a pupil in my class: "Sir, that should be a 3!"
I like to think I was a reasonably good maths teacher for the very short period of time I was one - my favourite quote from a pupil in my class: "Sir, that should be a 3!"
Yes, and with a previous hat on, one of the tasks I once got asked to do was a script to calculate prices to be applied to products based on "cost price + markup, and apply rounding to standard prices" - so 99p, £1.49, £1.99, and so on.
And yes, it is actually true - £19.99 is "a lot less" than £20" to many people. When I look at petrol prices I'll round up the 0.1p, so (say) 115.9p/l to me is 116p/l - but to my wife it's 115p/l.
Had a lecturer at uni like that. He was a mathematician teaching mathematics (partial differential equations IIRC) as an end in itself to engineers - who almost all of us couldn't grasp something like that without it having "real world" application. Needless to say, nearly all of us struggled with that one
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