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Some of you think you're clever, some of you really ARE clever -- others of you know you're stupid. But now you have the chance to prove yourself. I'm going to set a little problem. Phobiazero has confirmed the 1st person to supply the correct answer will get 10 bonus points** the problem a teacher shares £2 among 20 school kids. Some kids get 5p, some kids get 25p. How many children get 25p? **Not really |
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shit i dont even remember how livre works i hate math, im going back into my house |
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errgghh... I dunno the currency of pounds very well, so... :s |
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a. why would a teacher share £2 between those kids in the first place? Where's the educational value in that? b. why not just give them al 10p? It seems really unfair to give one kid more than the other. How is that supposed to make the 5p-kids feel about themselves? :-p |
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YEAH! how about a little somethin', you know... for the effort! |
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5 kids get 25p |
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trick question. you could give 8 kids 25p and the rest nothing. |
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tis is rediculous there's more than 1 answer... but wtf, one possible answer could be that 4 get 25p and 20 get 5p |
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correct! Now explain the working out tolstoy |
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well, 6 kids 25p and five 5p to stick by the rules all the same theres a lot of permutations cause you didnt say you couldnt give some kids nothing. |
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hey my post was meant to be placed after surrounded's post |
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whats there to explain? :) |
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Answer: undefined...the answer can range from 2 to 18 Explanation: some kids get 5p and some kids get 25p (kids = plural), so there must be at least 2 kids who get 25p. On the other hand there must be at least 2 kids who get 5p, hence the maximum of 18 kids that get 25p. |
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shit....18 = 6 calculation error |
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I should have known some of you would think it was a trick question! Let X be the amount of children who 25p (20-X)=the amount of kids who get 5p 25X+5(20-X)=200pence 25X+100-5X=200 20X=100 X=5 |
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I 0p (25p) (5p) I you did imply that the sets on 25p and 5p were mutually exclusive but you didnt exlcude the set outside of 25p and 5p |
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ok, 5 get 25 15 get 5 thats 2 pounds and everyone gets it... |
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I stink at maths :( |
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argh! the only sums given were 25p and 5p...all the kids got something. tada! happy now? |
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oh im happy but you didnt word the question well enough :) id contest that in a math test and earn the whole class an extra mark! 'some' doesnt mean the whole set has been accounted for |
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but dont take my word for it, im a computer science dropout :) |
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Yeah, I was just putting as it was put in the textbook ;P So blame the person who wrote that book :) I'm on the question after that right now. A father is 4 times as old as his son. In 4 years, he'll be 3 times as old. How old are they now? |
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am i allowed to answer? |
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8 and 32 |
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Well, I haven't worked it out yet (my text book is at home), but of course you can answer - I know the kid's age, because I accidentally caught it whilst checking the answer of the question before :| |
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cmon i did that in my head :) |
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Yes, that's right -- how did you work it out - I had y as the kids age and some crap equation: 4y+4=3y, but since that gave a minus age I quickly abandoned it and went into town to buy some books! :D |
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Oh, btw, for the textbook, you have to turn the questions into algebraic formulas and work them out - rather than going thru the ages until you get the right one! :D (I'm not suggesting this is what you did, johnny :)...) |
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just checked my imprinted times table |
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oh well x = 4y x + 4 = 3(y + 4) 4y + 4 = 3y + 12 y = 8 |
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