Forum Home
Press F1
Thread ID: 50661	2004-10-28 06:23:00	Maths Revision	Gum Digger (5187)	Press F1

Post ID	Timestamp	Content	User
285484	2004-10-29 03:44:00	> For a starter, the teacher needs to sacked. Even my > third form brother did it in less than two minutes! > [yes he did have a calculator]. If this is what your > complaining about, then don't even think about IGCSE. > Personally, I see NCEA questions as being great, real > life problems.. etc. IGCSE has questions usually 8 > parts wrong. If you stuff it up at the start.. you're > stuffed. They mislead you more than anything else. > > This is soooooooooooooo easy! Look.... > > 1) He gets $45 from his mum for 24 months (2 > years)... so > 45x24=$1080 > 2) He pays $2992 in the end after two paying two lots > of interest... so > 2992/1.105/1.105=$2450.40 > > So in total, 70% of the cost is made up of > $1080+$2450.40=$3530.40 > > Now, to find 100% you go > $3530.40/0.7=$5043.43 > > Bingo! I don't see whats so confusing! > > I can understand why your class can't understand.. > because your teacher can't! IGCSE with that kind of > teacher? Dream on.... > > I shall go enrol for teachers college for next > year.... muwhahah :D IGSE huh? LOL! For starters: He's not getting the money from his mum monthly,the 45/month is for repayments. The confusing part is that the question is a limp cabbage! It doesn't specifically say where the deposit or the lump sum after the two years come from!	RobbyW (5226)
285485	2004-10-29 03:48:00	Disclaimer: I also mean no offence by my post - I just wish to point how incredibly horrid this question is. I appreciate your attempt to educate me, but it is unneeded - I know maths - the problem is in the logic of the question. He borrowed 70% to pay the car, after paying a 30% deposit. Therefore he owes the car dealer 70% of the car. >Bingo! I don't see whats so confusing! Probably because you read the question incorrectly - he doesn't receive money from his parents, he pays them money. Which brings me to the point - if he owes the car dealer 70% of the car, and he has a deal with them to pay back 70% of the car, then why does he have to pay his parents? Furthermore, if he owes the car dealer 70%, then his deal would be to pay back the remainder of the car in a lumpsome, so he will pay them back 70% of car with interest. As you correctly calculated, this is 2992/(1.105^2)=$2450.40. Therefore, as this is the 70% of the car that he owed the dealer, then it is the 70% of the car that he needs to pay back. Therefore the car should cost $2450.40/0.7=$3500.57. Not as you say $5043.43. Infact the marketing schedule said we're both wrong. The stupidest thing about the question is that his parents don't enter into the equation. Can someone give me a good explanation why how much he pays his parents must be added to how much he pays the car yard? I mean wtf? >I can understand why your class can't understand.. Are you sure you can understand? A friend was telling me today that IGCSE isn't all it's cracked up to be - sure I want to do it, it's better than NCEA - but you only need like three tenses to pass French or Japanese? Pfft. I implore you all to not take said questions lightly, study, study study - you'll only get these right with experience.	Growly (6)
285486	2004-10-29 03:52:00	Note: "Infact the marketing schedule said we're both wrong." is a deliberate attempt to lower NCEA to nothing more than face value to show we have an education system (a bit harsh). Oh, and I'm in 5th form....	Growly (6)
285487	2004-10-29 04:39:00	Ok, Growly. Always nice to have feedback. Besides I don't even know if thats right :p.. Do you mind posting the answer? And what paper is it from, year date.. etc. Or links?	~~~~~ s y ~~~~~ (2054)
285488	2004-10-29 04:45:00	> The answer was (amount he paid his mum + amount > for car pre the interest)/0 . 7 . i dont understand the irony in this . u said ~~sy~~~ was wrong even though u already had this . according to what u said as per above and sys working i see nothing wrong with what sy did . i would be interested to see the workings behind this . . . or maybe im just not as good at maths as i should be . . . :(	techie_fanatic (5619)
285489	2004-10-29 04:57:00	AH! i SEE where your coming from Robyn... yes, hes not receiving is he!!! my bad :( Oh well.. I think I've read it enough times to say quits. nice little exercise for the day.	techie_fanatic (5619)
285490	2004-10-29 05:04:00	Sorry your quite right. I did read the question wrong and thus told my bro the wrong question. See what happens when your on too much study leave ;-) And yes, I still agree NCEA 'is not the best' But I'd say the answer is incorrect. I'd be interested to see the q/a as I mentioned before. My bad, friends again! :p	~~~~~ s y ~~~~~ (2054)
285491	2004-10-29 05:42:00	>John bought a car. He paid a 30% deposit and borrowed the remaining 70%. He will pay the money back using two methods: I'm no maths wiz, but I can't see how anybody can do other than get one of several correct answers here, there are too many unanswered questions, for example: 1) Did he borrow the 30% from his parents to make the deposit? 2) If not, did he have the deposit saved, and the borrowing from his parents was in fact part of the 70%? 3) You only know how much he owed the dealer. I suspect that the original question may have contained just a little more information. Cheers Billy 8-{)	Billy T (70)
285492	2004-10-29 05:50:00	What colour is the car?	Shaun Minfie (2961)
285493	2004-10-29 06:05:00	>1) Did he borrow the 30% from his parents to make the deposit? >2) If not, did he have the deposit saved, and the borrowing from his parents was in fact part of the 70%? >3) You only know how much he owed the dealer . >I suspect that the original question may have contained just a little more information . It contained no extra information . That's the whole point . >i dont understand the irony in this . u said ~~sy~~~ was wrong even though u already had this . according to what u said as per above and sys working i see nothing wrong with what sy did . First of all, I don't see any irony at all - second of all, I never came to the conclusion that the answer was (amount he paid his mum + amount for car pre the interest)/0 . 7 - my question was how on earth could you deduce that from such a poorly worded question . This is not a test of wits . I wanted to show you how stupid these questions can be . The fact that you are defending yourselves and claiming that you know the answer is beyond me . . . The answer, according to the marking schedule, was (amount he paid his mum + amount for car pre the interest)/0 . 7 . [i]What I and many others want to know is why it is mount he paid his mum + amount for car pre the interest, when the amount he paid is mum is irrelevant and doesn't even enter into it, based on what we know . If you can prove that how much he owes his mum is relevant to the cost of the car, then please patronise me all you want and tell me how . Until then, I think it's safe to say that the question sucks . It always sucked . Sorry for the off-topicness, but I originally wanted to show how stupid it was .	Growly (6)
1 2 3 4 5 6 7