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Re: NECO Math Questions Some Teachers Couldn't Solve by philipobiz: 9:56am On Jun 29, 2016 |
Q3. The man's age 4yrs ago was 448÷5= 89.6. His current age is 89.6+4=93.6. Since he is 5 times older that his son 4yrs ago. The son's age was 89.6÷5= 17.92. Therefore, his current age is 17.92+4= 21.92. The man's current age = 95 yrs 6 days The son's current age = 21yrs 92days |
Re: NECO Math Questions Some Teachers Couldn't Solve by TamedWolf90: 9:59am On Jun 29, 2016 |
Xflint:I admire you...wish I could do what you just did. |
Re: NECO Math Questions Some Teachers Couldn't Solve by Xflint(m): 10:02am On Jun 29, 2016 |
TamedWolf90: Thanks, i just use it to keep myself busy. And besides i am beginning to forget some of the maths them |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 10:02am On Jun 29, 2016 |
Laive:Four years ago; son's age=x-4, father's age=5x-4. Now, product of their ages four years ago= (5x-4)(x-4)=448. Expnsion of the bracket gives:5x^2-24x+16=448 and this equals 5x^2-24x-432=0. Now following the a x c formula to expand b,a=5,c=-432,b=-24, a x c=5 x -432 =-2160. Look for two numbers such that when u multiply u get -2160 n wen u add u get -24, the two numbers are -60 and 36. Now d equation above becomes: 5x^2-60x+36x-432=0, when u group and find the common factor, u get 5x(x-12) + 36(x-12)=0, (5x+36)(x-1 |
Re: NECO Math Questions Some Teachers Couldn't Solve by Iceberg3: 10:07am On Jun 29, 2016 |
Elxandre:artful doger,na ya answer be dis? |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 10:08am On Jun 29, 2016 |
Wealthgang:. My dear recommend new maths teachers for your school...students of the school are so suffering |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 10:09am On Jun 29, 2016 |
Laive:I can help you. Let son's present age= x and father's present age=5x. Four years ago; son's age=x-4, father's age=5x-4. Now, product of their ages four years ago= (5x-4)(x-4)=448. Expnsion of the bracket gives:5x^2-24x+16=448 and this equals 5x^2-24x-432=0. Now following the a x c formula to expand b,a=5,c=-432,b=-24, a x c=5 x -432 =-2160. Look for two numbers such that when u multiply u get -2160 n wen u add u get -24, the two numbers are -60 and 36. Now d equation above becomes: 5x^2-60x+36x-432=0, when u group and find the common factor, u get 5x(x-12) + 36(x-12)=0,then (5x+36)(x-12)=0, 5x+36=0 or x-12=0, x=-7.2 or 12, since age cannot b negative, therefore x=12, so son's prese nt age=x=12 and father's age=5x=60. |
Re: NECO Math Questions Some Teachers Couldn't Solve by famagusta(m): 10:13am On Jun 29, 2016 |
Please I need a maths tutor for myself... 08182676459, dats my number. Am in Abuja. |
Re: NECO Math Questions Some Teachers Couldn't Solve by emsheddy(m): 10:14am On Jun 29, 2016 |
canymix:Am telling you bro! It didn't take me up to an hour to trash all the neco theory questions for my students in SS 2! Any maths teacher who can't solve those questions is not fit to be called a maths teacher! By the way, make una employ better maths teachers for that una school oh! I won't mind porting to that school if the pay is worthwhile! Cc Wealthgang |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 10:15am On Jun 29, 2016 |
Laive:I can help you. Let son's present age= x and father's present age=5x. Four years ago; son's age=x-4, father's age=5x-4. Now, product of their ages four years ago= (5x-4)(x-4)=448. Expnsion of the bracket gives:5x^2-24x+16=448 and this equals 5x^2-24x-432=0. Now following the a x c formula to expand b,a=5,c=-432,b=-24, a x c=5 x -432 =-2160. Look for two numbers such that when u multiply u get -2160 n wen u add u get -24, the two numbers are -60 and 36. Now d equation above becomes: 5x^2-60x+36x-432=0, when u group and find the common factor, u get 5x(x-12) + 36(x-12)=0,then (5x+36)(x-12)=0, 5x+36=0 or x-12=0, x=-7.2 or 12, since age cannot b negative, therefore x=12, so son's prese nt age=x=12 and father's age=5x=60. |
Re: NECO Math Questions Some Teachers Couldn't Solve by Elxandre(m): 10:16am On Jun 29, 2016 |
Iceberg3:solved two Before abandoning the task. Too busy to post them on NL. These things are basic stuff. Suppose I couldn't even solve them, I'm not a math teacher |
Re: NECO Math Questions Some Teachers Couldn't Solve by aremed(m): 10:16am On Jun 29, 2016 |
Are you alk writing in TONGUE? |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 10:19am On Jun 29, 2016 |
Common confusion. If you say 5 times OLDER THAN, you expect x-y = 5y therefore x = 6y If you mean 5 times AS OLD As, then x = 5y Where x and y are the ages of father and son respectively. Math teachers should learn to state questions correctly. Annakrutitskaya Senior Member Russian Hello! I would be grateful for the help - I am confused with underlined explanation. (from Gmat sentence correction) Right: The man is FIVE TIMES AS OLD AS his grandson. Wrong: The man is FIVE TIMES OLDER THAN his grandson. The first sentence means that the mans age = 5 x his grandsons age. In the second example, the author is technically saying that the man is six times as old as his grandson. This meaning is unlikely; the author probably meant “five times as old.” Why 'five times older than' equals 'six times as old as'? Thank you! Annakrutitskaya, Aug 15, 2014 #1 2 Likes |
Re: NECO Math Questions Some Teachers Couldn't Solve by 2sexycom(m): 10:24am On Jun 29, 2016 |
Horlawale1:You wouldn't have a say if not for the stupidity of the Nigerian society were celebrities are celebrated above scholars and thereby making a mockery of them(scholars). |
Re: NECO Math Questions Some Teachers Couldn't Solve by montumonami(m): 10:36am On Jun 29, 2016 |
[color=#006600][/color]
The sons age is 12..... Dads age is
60 |
Re: NECO Math Questions Some Teachers Couldn't Solve by laperson: 10:42am On Jun 29, 2016 |
It is unfortunate that the so-called mathematicians don't reason deeply anymore. You are the only one that pointed that error out and I appreciate you for it. Thank you RaggedyAnn: 2 Likes |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 10:42am On Jun 29, 2016 |
Joice21:Thanks Joice21. I can't afford to do Maths without people like you. But my main wahala is: "finding a number that when u multiply... and when u add...". All the same, thanks... |
Re: NECO Math Questions Some Teachers Couldn't Solve by Xflint(m): 10:56am On Jun 29, 2016 |
famagusta: You can join the forum @http://forum.mathsboard.com/ |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nely77(m): 11:03am On Jun 29, 2016 |
Mypeople2:you are totally wrong! Who was your mathematics teacher? He/she did not try at all. |
Re: NECO Math Questions Some Teachers Couldn't Solve by nurex01(m): 11:08am On Jun 29, 2016 |
Check it out
|
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 11:09am On Jun 29, 2016 |
oohgdtjb vb |
Re: NECO Math Questions Some Teachers Couldn't Solve by deluxecad(m): 11:11am On Jun 29, 2016 |
Wealthgang: Q3. Present ages are: Son = 12 years Man = 60 years Q. 7a n = 0 Im coming..... |
Re: NECO Math Questions Some Teachers Couldn't Solve by chiamyN: 11:13am On Jun 29, 2016 |
Xflint:I like your solution. I could only fully remember the quadratic almighty formular.... you really dissected these problems. I love maths so much. This is my best post and these NECO questions are easy enough. Any maths teacher that cannot solve this is not worthy of being called a maths teacher. QED |
Re: NECO Math Questions Some Teachers Couldn't Solve by Sultty(m): 11:19am On Jun 29, 2016 |
Wealthgang:Those days where men where boys i can trash these in minutes but now i'm all rusty. Nice one by d way and as for the teacher should not be teaching maths. Find another subject like irk/crk or even yoruba trust me he/she will perform better 1 Like |
Re: NECO Math Questions Some Teachers Couldn't Solve by Phi001(m): 11:31am On Jun 29, 2016 |
Q3: Son is 12 yrs, The Father is 60 yrs
Q7a: n= 1 or 0
Q7b: x= 1 or 4
Q9a: The number is 94 |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 11:33am On Jun 29, 2016 |
BLoomfrancs: Smh! Then post pictures of d robots u've built or
|
Re: NECO Math Questions Some Teachers Couldn't Solve by Phi001(m): 11:36am On Jun 29, 2016 |
Nely77:Mr. Totally Wrong, what's the answer pls? |
Re: NECO Math Questions Some Teachers Couldn't Solve by djblue007(m): 11:41am On Jun 29, 2016 |
laperson:Thank God I have people that reason like I do. I think those examiners were even oblivious of this subtle error. I started my workings the same way this sister pointed but lost interest as the problem became rather more complicated. The moment you as a Mathematician start getting more complicated results which are not reasonable you retrace your steps. 1 Like |
Re: NECO Math Questions Some Teachers Couldn't Solve by djblue007(m): 11:45am On Jun 29, 2016 |
RaggedyAnn:God bless you, my sister! 1 Like |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nely77(m): 11:50am On Jun 29, 2016 |
Phi001:Go to school if you have not been to school. If you had been to school, then go back there and learn because you have learnt nothing since you cannot solve basic math's. |
Re: NECO Math Questions Some Teachers Couldn't Solve by Phi001(m): 11:50am On Jun 29, 2016 |
but tbh, when I think of what I solve as maths here in uni, I am reminded that 'maths' in secondary school is painfully easy!!!! |
Re: NECO Math Questions Some Teachers Couldn't Solve by Nobody: 11:52am On Jun 29, 2016 |
Laive:U've accmplished d most important thing which is to LEARN. Forget critics 1 Like |
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