Is there a strict rule in the UK on how to write long figures?  If so, which one is it?   For example, if I need to write long numbers and follow the UK standard, which figure is correct?     10 000 000 000 people (ten billion people) or 10,000,000,000 people ?    Same example but with another figure: which one is correct?      £1 000 000,85  or  £1,000,000.85
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Is it necessary to use comma in a big number? For example, if anyone writes one million four hundred thousand and two as 1400002 instead of 1,400,002 on answer sheet of listening section of IELTS test, will it be considered incorrect?  Thanks in advance.
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Why are year, pound and mile in the singular form in the phrases below?   five-year-old children  20 pound note 10 mile run   Is that because they're acting as adjectives, which are always invariable in English?  Is it incorrect to say...   five-years-old children? 20 pounds note? 10 miles run?
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Is it OK to use the amount of with countable nouns? I have come across the usage of it with people, but I am confused whether to use it with countables.   What about the proportion of? How different is it from the amount of and the number of ?  Thank you in advance for the answer.
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I wanted to see if folks were using decimal for financial applications instead of double.  I have seen lots of folks using double all over the place with unintended consequences . .  Do you see others making this mistake . . .
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Tests are hard to solve for large number of users.   Checking the similar usage of such expression, I think there is something wrong with the sentence. What's the best and correct? a large number OR large numbers OR even something else!
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Is there a convention around writing multiplication of fractions. Let us take two examples to be specific.  Example A: $ 2 \times \frac{1}{2} $  Here are some ways to write this example:   $ 2 \frac{1}{2} $ (does not seem like a good idea because this means $2.5$) $ 2 \times \frac{1}{2} $ $ 2 \cdot \frac{1}{2} $ $ (2) \left( \frac{1}{2} \right) $   Example B: $ \frac{1}{2} \times \frac{3}{4} $  Here are some ways to write this example:   $ \frac{1}{2} \frac{3}{4} $ $ \frac{1}{2} \times \frac{3}{4} $ $ \frac{1}{2} \cdot \frac{3}{4} $ $ \frac{1}{2} \left( \frac{3}{4} \right) $ $ \left( \frac{1}{2} \right) \left( \frac{3}{4} \right) $   Is there a preferred way of writing such multiplications in each case?
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Some students write, e.g., "$\sum(1/n^2)$ converges at $\pi^2/6$", where I would write "converges to".  Are there regions of the English-speaking world where it is standard to say "converges at"? Or should this be considered a mistake made by non-native speakers of English?
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Both my husband and I have decided to visit our son in London for a few weeks in the summer. I'm in full time employment as a teacher while my husband has just retired but still receives monthly income from his shares and investments.  When filling out the Income and expenditure section on the visa form, do we divide the costs and savings between us on each form or do we write the same figures?  For example in the following questions:   How much do you spend each month on living costs? What is the cost to you personally of your trip in GBP(£)? The total amount of money you have for this trip The cost of the aeroplane, boat or train tickets
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I have often heard people say 101, as one-zero-one, and also as one-oh-one. Which is correct, and why? Does the difference between British English and American English have to do something with it?
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My homework asks me the following:     If a student writes the integers from 5 to 305 inclusive by hand, how many times will she write the digit 5?   I started out by writing every number that contains 5 and I got 31, but 31 is not among the answers possible:     5, 15, 25, 35, 45, 55, 65, 75, 85, 95, 105, 115, 125, 135, 145, 155, 165, 175, 185, 195, 205, 215, 225, 235, 245, 255, 265, 275, 285, 295, 305   I counted 55, 155, and 255 as two each since there are two occurrences of the digit 5 in each.  I can't figure out what I'm doing wrong.  In addition, suppose I were given the numbers 1 and 100,000 - writing them out isn't efficient, and I would assume there's a formula for this but I can't figure that out either.
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I want to do regular long division in latex. See also:   Is there a latex macro for this ?  Edit: I actually want to use it in mathjax, is this possible ?
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What is the British English way of referring to a source in-text.  Is it plural because there are two authors, like this:         X and Y (2011) describe ...   Or is it singular because you are referring to a singular source, like this:     X and Y (2011) describes...   So what I am asking is whether you refer to the source or to the authors?
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Is there a non written rule to which person to use in the PhD thesis, 5 years of using "We" in the papers have brought me to the innate necessity to do it every time I describe something.  Recently, though, one of my lab-mates told me that I should use I, since it is your work, if the thesis were co-written, then it would be a different story.  Is there any standard in your universities, or do you have any preferred practice.
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There are 6 periods in each working day of a school. In how many ways can one organize 5 subjects such that each subject is allowed at least one period? Is the answer 1800 or 3600 ?  I have asked this question before () in this site itself to understand the right answer - 3600 or 1800? @Ross Millikan has given me a convincing answer and explained idea of overcounting and why 3600 is wrong. Posting it again here to assert the answer is 1800 and not 3600, mainly because almost all websites give 3600 as answer and only one website gives answer as 1800. Listing the websites for reference  (1) Ans is 3600 see() (2) Ans is 3600 see question 15 in () (3) Ans is 3600 - see 8th question in () (4) Ans is 3600 - see example 5 in () These sites as well as almost all reputed sites give the answer as 3600. But answer is 1800 according to   Sorry for asking the question again. Please tell me which is the right answer. 1800 or 3600. Since I am preparing for my exams, I don't want to be in the wrong path and hence clarifying.
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I have a simple question but I am not sure on how to proceed. I would like to put 10 figures on the same page: a grid of 5 rows and 2 columns.  What should I type in order to have the figure inserted like this and with equal alignement/size ? Eventually with custom captions... ;)
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Is it the same convention as those used in known programming languages such as Java and C? I'm trying to create a lot of variables and I want it to start with a number, but I'm not sure if it's okay.
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I've been wondering, since these example numbers end with 1, isn't it natural to use the following noun in its singular form?  From what I've been seeing around on the web this does not seem to be the case. All numbers except for 1 are followed by plural nouns.  In some languages you do need to use the singular form with the numbers ending with 1.  How is it supposed to be in English?