₦airaland Forum

thanks eyohimself

the answer is 20 please i'll get back with explanations
hope you are getting on well with your GRE preparations
and you have crammed enough words

tip for today:
in any triangle you have the sum of the lenght of any two sides is greater than the lenght of the third side

todays tip.

For a number to be divisible by 4,
the last two digits forms a number divisible by 4
e.g1
124
since 24 is divisible by 4 then 124 is divisible by 4
eg2
23780
since 80 is divisible by 4 then 23780 is divisible by 4

richy blacky
Thanks for pointing that out to me.
i sincerely do appreciate
i know from the first tym i saw your post on this thread that we are in for a great ride
i guess i was thinking too generally.

prof labiyemmy,

1. The number 1 is an oddity in classical number theory as it is neither ______ nor ______.

prime, composite
real, imaginary
even, odd
rational, trancendental

answer:prime,composite
(i chose that answer because i is an odd number,it's a real number and it's rational)


2. The number 2 is the highest exponent that will solve (in integers):

The Four Colour Theorem
The Odd/Even Theorem
The Prime Decomposition Theorem
Fermat's Last Theorem
answer: the femlat last theorem


4. Although we like whole numbers like the number 4, not all numbers are "nice". Most numbers are actually irrational - that is, non-terminating, non-repeating decimals. Three famous irrational numbers are phi (the Golden ratio), e (the Euler number), and pi (the ratio of a circle's circumference to it's diameter). The whole number "4" is a ROUGH approximation of which of the following?

(pi) - (e) + (phi)
(pi) - (e) - (phi)
(pi) + (e) - (phi)
(pi) + (e) + (phi)

Answer pi) + (e) - (phi)=3.14+2.718-1.68 is approximately 4


5. I love divisibility tricks. Do you know how to tell if a number is divisible by 5, say a really large number like 1203454045? Of course you do. It's because the last digit is a "5". So, if the last digit is a "5", that number is divisible by "5". For what other numbers does this trick always work?

2 (21872 is divisible by 2)
2 and 3 (21872 is divisible by 2; and 663 is divisible by 3)
2, 4, and 8 (the number 33728 is divisible by 2, 4, and Cool
2 and 4 (7884 is divisible by both 2 and 4)

Answer it is only true for 2
numbers that ends in 2 can be divided by 2.
not all numbers that ends in 4,8,3 can be divided by 4,8,3 respectively e.g 774,3778 and 413 respectively


6. Oh, that 6! What a perfect number! As perfect as 28. Why is the number 6 so perfect?

6 = 1+2+3
6 = 10 -4
6 = 2 x 3
6 = 12/2

6 is a perfect number because the its factors adds up yo give 6
1+2+3=6





8. The number 8 is the largest cube in the Fibonacci Sequence. Given two consecutive terms of the Fibonacci Sequence, how would you find the one after that?

Add the two given terms up
Subtract the larger term from the smaller
Multiply the two given terms
Square the two terms and add them up

Answer: Add the given terms up


9. The number 9 has an unusual property that is not shared by any other number. What is it?

A perfect square less than 15
A square the sum of two different cubes
A numeral that when you turn it upside down, it is still a numeral ("9" rotated 180 degrees becomes "6"
It is the arithmetic mean of a perfect square and a perfect cube

Answer :it's a square, 3^2 and it is the sum of two different cubes 1^3 + 2^3=1+8=9


10. Lastly, the number 10. Since this is done on a computer, the computer will read "10" as a very different number than we would. What would the computer interpret "10" as?

3
1
2
0

answer :binary number 2

zebra,
i found a link that you (and any one interested in eigenvalues and eigen vector) might be interested in.
hope fully it's helpful
http://answers.yahoo.com/question/index?qid=20060901084345AAsBsDY

Sorry guyz
i've been away for some tym.
my tip for today is how to know if a number is divisible by 11

for a number to be divisible by 11 the sum of the digits in odd places and the sum of the digits in even places must be equal.
eg

144133
the digits in odd places are 1, 4,3 in that order they adds up to be 1+4+3=8
the digits in even places are 4, 1,3 in that order they adds up to be 4+1+3=8
therefore the number144133 is divisible by 11
144133/11=13103

another example is 154
the number in the odd places are1,4 and adds up to (1+4)=5
the digit in the even place is 5
so 154 is divisible by 11
154/11=14
another example 2347
sum of digits in odd place is 2+4=6
sum of digits in even place is 3+7=10

6 is not equal to 10
hence
2347 is not divisible by 11


lovemajek
such a brilliant damsel like you
need not have an headache
you get use to all those jargons with tym. just keep reading and contributing
you i'm going to be counting on you and other great brains
as more and more people are bringing on questions
Thank you for your interest

RichyBlack
You are welcome sir

zebra
Do you use matlab or mathematica?
Solving for the eigen value and eigen vector by hand is posible but rigorous
you can use any the two software above in solving it.if it's so urgent and i've not given you enough help,kindly give me a call or drop me a mail.

carlosein,
Thank you for your contribution
i can't wait for you come on with your contribution
Thank you very much in advance

Sniperwolf
You are welcome on this thread.

@ poster simple MTH 423 qusetion:
What's the major difference between Partial Differential Equation PDE and Ordinar Differential Equation ODE

a partial differential equation (PDE) is a type of differential equation, i. e. a relation involving an unknown function of several independent variables and its partial derivatives with respect to those variable

e.g function f: f(x,y,z) is a function dependent on x ,y and z hence to differentiate f we have to differentiate w.r.t x, y and z hence we'll have to employ PDE

an ordinary differential equation (or ODE) is a relation that contains functions of only one independent variable, and one or more of its derivatives with respect to that variable.

e.g Function f:f(x) is a function dependent on x only and hence to differentiate f we differentiate w.r.t x only
hence we apply ODE

@ poster here's a simple statistics for SS2 student
The probability of buying a car is 1/3
The probability of buying a house is 1/2.
What's the probability of buying a car or a house?
If you don't know your mutually exclusive events and non- mutually exclusive event I guess you should go back to school

why do i need to go back to school when i have a guru like you in the house who can easily put me through.
you can post your correction to my solution below.

let probability of buying a car be p(c)=1/3
let probability of buying a house be p(h)=1/2
p(c u h) is the probability of buying a house or a car
p(c n h) is the probability of buying a house and a car=0( the event of buying a house and a car are mutually exclusive)
p(c u h)=p(c)+p(h)-p(c n h)

p(c u h)=1/3 +1/2-0=(2+3)/6=5/6

be kind to post more questions ,answers ,correction examples a better explanation of questions that has been solved
Thank you real good in advance

hello everyone,
my tips for today is as follows
for a number to divisible by 3 then the sum of the digits must be divisible by 3.
e.g 18 ;1+8=9
9/3=3 hence 18 is divisible by 3
another exaple is 12345
1+2+3+4+5=15
15/3=5
therefore 12345 is divisible by 3

lai-lai
come on if you have any question i mean any maths questions(e.g you can ask a question as simple as 2+2) do bring it oni promise if nobody would answer i will.And remember nobody can even see your face.
Thank you in advance lai-lai

RichyBlack
I am so thrilled and honoured to have you contribute on this thread.I've been following your post,you are such a great person.
Thanx for saving the day on that number2
i actually worked it on my own and got the same answer as yours and was trying to post it but my connection was having a little problem.
Once again thank you so very much.
i look forward to reading more of you on this thread.

1. i'll choose 5 &2


3. 2cm

4. 3men build in 10 days
1 man build in 30 days working @ the same rate
2 men builds in 30/2=15 days
5. he has 9 secs to answer the 3 questions
3secs to answer 1 question

6 2744cm^3

7 isosceles triangle


8 5 lines of symmetry

9 Heptagon is a 7- sided polygon
1 side is 2.5m hence 7 sides is 7*2.5=17.5m
convert to km by dividing by 1000
hence perimeter=0.0175km

10 1 cm^3 = 1 milliliter
11 ml for a week=77ml
=77cm^3

note it's not 17.5 m^2 that would be an area

9

from today i like to start posting some mathematics tips on a daily basis.

the difference btween a number and it's mirror image is always divisible by 9

e.g1
122 is a mirror image of 221 .
the difference is 221-122=99
99/9=11
e.g2
25 is a mirror of 52
52-25=27
27/9=3

i'll be ready to answer your quetion on this and anyother thing
but remember keep it restrictd to maths
thank you in advance

hi guyz ,
this morning i was thinking what life is really all about.i felt like the aspirations ,the urge to be someone, is all about what in the first place.i asked myself if gain all the riches now what is the end of it anyway.why should i be rich.An answer that readily comes to mind is you dont want to suffer,or you want be the next bill gate,the next warren bufet, dangote and the likes,OK after that what next.
all this feeling started making me feel like i'll just play it soft.

BUT light shone through,and i discover if you dont want anything for yourself what about your kids born or unborn,what about the children on the street,what about Standing up for Nigeria and making it a relevant country in world politics,what about orphanages,what about the touts ,what about healthier enviroment,what about speaking out for people who don't know their rights.

Young People of Nigeria,life is worth living,it's worth fighting for.POSTERITY beckons and says come.It says stand up and be counted, it says if our elderly refuse to plan for us let's get a plan for ourselves.let's chat a course for our future.You may be quick to say that there is not much you can do.may be may be not.
But seun osewa (whether we like his style or not) host a website where many of us can get to share our ideas and current information.Im conviced for you clicking on this thread in the first place means you believe in honour,you believe in making a difference,you are not content with just being one in the number.
But again you say you don't have the resources,but at least you can plan,you can dream, you are alive,you can read,youcan write,you can use the internet whether verywell or not.whether you have 24/7 access or not.(i don't have either,i am typing this ffrom a friend's lappie,when there is a will ther is a way)
You know i like telling myself "it doesn't cost anymoney to dream" and i beleive it s strongly.So get out of just expecting nigeria to deliver the goods,you do something.then you ask me what and my answer is I DONT KNOW.but i do know that anything you wish you could have had for been a nigerian and was not there you(I MEAN YOU CAN MAKE IT HAPPEN )
I guess i should stop now let me allow you reply to this thread.because by now you are either very angry with me or boiling and just want to do something
Either way ,i thank you in advance for replying me and let me know how i can stand up too.

someone said something that life is for the bold and i have found it to be so true.
i think we need not wait for anyone let's just bring them on.Questions ,answers,criticism,contributions, as far as it is mathematics.
only let's be objective.
don't be afraid to be wrong because most people that we listen to today are not all correct but they unlike many have one thing : gutz

Hello labiyemmy,

nice one i guess you save the day.congratulation on your first class.
You are the whiz we've been waiting for.

lovemajek,
i concur 100% with what you said
"education is the first step to human freedom from all global atrocities"
Thanks for your post

naijacute,
Thank you so very much i sincerely appreciate.

Holiness_m,
i actually use the cafe that's why i've not been on for quite sometime.

for question 8 ,
which transformation are you talking about.You gave homogeneity and additivity as 2 conditions for linearity of a transformation and f(0)=0
but you said "which of the following transformations is linear? "
you suppose to give me the transformations whose linearity i would test.
or may be i'm missing something there.

i really want to say a big thank you for the questions,you 've definitely made me a better mathematics student.For me learning never stops.

6. Jefferson National Expansion Memorial /the Gateway Arch

5.Squeeze theorem/sandwich theorem/pinching theorem

of course i dare not argue with a doc but just do the correction so that me and other great nigerian students can learn.
Thank you so very much in advance
7 ln(-1) does not exist

10. That's an equation of a plane

hello Dr holiness_m
Thanx for your tym Dr how is Uk today

Boy i like your questions they are giving me a run for my claims
1.cosine rule

2.It's actually called fundamental law of calculus:states that differentiation and integration are inverse operations

3.L'hospital rule
4.Dr , to numerically integrate a function we need to know the limits.and most function can be numerically integrated if we know btween the limits we are integrating it

7.

jamb,gce,ssce and any kind of exams too are welcome as long as it is mathematics

hello everyone,
i have been going through various threads on nairaland and sincerely i am impressed by how young nigerian are helping each other.Seun you know you have acheived a fit that's a dream for many.keep it up bro.
By a way of introduction i recently graduated from O.A.U ile ife chemical engineering with a first class(i said that humbly) and iam currently serving in an oil company in ikoyi.
i humbly want to contribute my own quota on this site and since mathematics is my strenght i decided to do something along that line
if anyone has any maths question,assignment , from secondary school level to university,gmat,gre and sat maths questions, Kindly bring it on .

All the maths whiz in the house come on let's make this thread exciting

@everyone
how much does it cost to post a document to the usa and the uk repectively
thnks