MATHS CAMP 2010!!!! Let's get excited!!!

HALLOOOO my dear Maths Soc members!!! (:

Seems like I can't contact four of you guys via email or handphone since I don't have them. So here comes this post!!! PLEASE PLEASE read carefully!!! :D

First of all, I must say that I’m very very sorry for late sending this IMPORTANT email regarding our 1^st Maths Society camp due to the fact that the details of our outdoor activity is not yet confirmed!!!

So here are some important things you guys need to take note of:

1. Camp schedule

Day 1 – 18^th March 2010

Time	Event	Remark
1445 – 1500	Reporting time	Amphitheatre
1500 – 1530	Proceed to classrooms to prepare	TC21-22
1530 – 1700	Station games	Around school
1700 – 1730	Birthday celebration	Canteen/amphitheatre
1730 – 1815	Wash-up	Toilets
1815 – 1915	Dinner	Canteen/amphitheatre
1915 – 2000	Skit preparation	Anywhere
2000 – 2200	Night hunt	Around school
2200	Lights out	TC21-22

Day 2 - 19^th March 2010

Time	Event	Remark
0600 – 0630	Wake-up and get ready for mass dance
0630 – 0745	Morning exercise and mass dance – Algorithm March	Amphitheatre
0745 – 0830	Breakfast	Canteen
0830 – 1045	Skit	Amphitheatre
1045 – 1100	Short – break
1100 – 1200	Lunch	Canteen/amphitheatre
1200 – 1300	Travel to the outdoor-activity place
1300 – 1600	Outdoor activities, e.g. sports, games such as dragon boating

2. Things to bring:

_report in PE attire at 2.45 pm on Thursday (18^th March)

_personal toiletries and insect repellent (if you wish to)

_sleeping bag (if you don’t have please try to borrow it, it would make you feel much more comfortable)

_extra set of clothes so you can wear them after bath (i.e. shorts + T-shirts since we will be having quite a lot of activities the next day too!)

_flash light for night hunt (if you think you are scared of darkness hehe)

_for pending dragon-boat activity, please bring along long-sleeved shirt, long pants, water-activity shoes, sunblock, etc). Though this is pending, I would really appreciate if you would bring all of these items, they are meant for your own safety guys!!!

_oh if you want can bring along your cameras and take photos so you would have something to remember after the camp

3. Night hunt grouping

S/No	FULL Name of Student	Level	Birthday	Night-hunt group
1	Alison Chew Miew Yi	JH4	17/1/1993
2	Bui Hai Minh	SH2	16/9/1991
3	Chen Weijie	JH4	7/7/1994	1
4	Tong Hien Chi	JH3	17/12/1994	2
5	Dang Hoai Phi	SH2	12/1/1991	1
6	Do Thi Ngan Giang	JH4	17/5/1993	1
7	Jiang Yuan	SH2	26/02/1991
8	Lei Peng	JH4		2
9	Lim Jiaying	JH4	20/05/1994	3
10	Lin Xiaoliang	SH1	1/12/1992	4
11	Liu Kangxin	JH4	22/06/1993	4
12	Liu Tianyu	SH1		4
13	Liu Yixuan	SH1	25/6/1992
14	Loh Pei Ni Adora	SH1	28/11/1993	2
15	Lu Yaozhi	SH2	20/12/1990
16	Mac Hoai Linh	SH1	19/3/1991
17	Nguyen Anh Khoa	SH2	19/4/1991	2
18	Nguyen Phu Lam	SH1	14/6/1993	3
19	Peng Peng	SH1	12/5/1992	4
20	Tang Ningrui	SH2
21	Tran Quoc Dat	SH1		4
22	Tran Thuy Chi	SH1	27/7/1992	1
23	Wan Linyu	SH1	24/08/1992	3
24	Wang Xuling	SH2	24/10/1990
25	Zhang Ruizhi	JH4	22/07/1992	3

YUP, that’s about it!!! Be punctual on Thursday, see you all at 2.45 pm, Amphitheatre. Meanwhile, rest well and HAPPY HOLIDAYS :D

Love,

Linh

MATHS CAMP!!!!!

finally, our FIRST maths soc camp is here!!!

18th Feb, 2.45pm @ amphitheater

please be there in PE attire :)

if you have any question, kindly message Linh, our lovely vp, at 91756541

Yay can't wait to see all of you there :D:D:D

:D

hellllllllooooooooooo x)

just in case you are feeling bored during the hols, here are some logic questions for you all to try xD

a) You come across a strange place where 2 types of people live. The additors, who always tell the truth, and the subtractors, who always lie. Weirder still, if you ask an additor and a subtractor a question at the same time, they will both lie. And, if you ask 2 subtractors a question at the same time, they will both tell the truth. The same goes if they say something together (both additor + subtractor and 2 subtractor). However, 2 additors never answer together. (When the truth is told, everything in the statement is true. When a lie is told, everything in the statement is false)

i) On the road, you come to a split in the road, where it diverges into 2 paths. 1 path leads to your destination (the grove of Great Power! Or whatever, the place mentioned by the Minister), the other does not, but you don’t know which goes where. Fortunately, you meet 2 people at the split. Unfortunately, one of them is a additor, and the other is a subtractor, but you don’t know who is who. They both know which the correct path is. As you are in a hurry, you can only spend time to ask 1 question to 1 person. What question will you ask to get the right path?

ii) Along the path, you meet a bunch of 4 locals, A, B, C, and D.

A says: “There is at least one additor and one subtractor among us”.

B says: “Liar!”

This prompts C and D to say together: “Liar!”

Who is who?

iii) Nearing your destination, you meet yet another bunch of locals. This time, there are 5 of them: E, F, G, H, I. Fed up with the confusing statements of the previous bunch, you decide to ask before they can say anything.

Pointing at E and F, you ask, “How many subtractors are there?”

They reply: “Two”

Before you can ask another question, G pipes in, “No, it’s three!”

Much to your exasperation, H and I join in also.

I: “I am not a subtractor!

H: “But E is!”

After some thinking, you realize that you can infer who are the additors and subtractors from their statements. So who are they?

iv) Feeling pleased with yourself for being so smart, you arrive at your destination. There, you encounter a kooky old local. You hear him muttering to himself

“If I’m an additor, then my wife is a subtractor.”

Eh?

v) Still a bit dazed by your encounter with that eccentric old man, you run, literally, into a cranky couple: J and K

They say together: “I think you got a good pair of eyes, little one.”

Then J tells K: “We really think so.”

K replies: “No, we do not”

J then grumbles: “Then we’re both liars”

Who is who?

HAVE FUN :D

IMPORTANT!!!!
There will be Maths Soc session this week, 12th March, 4.45 pm.

We will be discussing about all the important events so please be there on time! Those who cannot come please sms Minh and provide the reason.

Again, this session is very important so we hope to see all of you there :)

last but not least
ALL THE BEST FOR OUR JH3, JH4 MEMBERS FOR ASSESSMENT WEEK :D:D:D
CONQUER IT!!!
MAKE US PROUD :D

HAPPY WORLD MATHS DAY =)

For all Maths lovers, please click here and let's us unite to set a Guinness World Record for the largest online math competition in the world.

Singapore Mathematics Olympiad Training

Mathematics Society would like to invite interested students to join the training sessions.

Start: 03 March 2010 End: 26 May 2010
Date: every Wednesday
No. of sessions: 10
Time: Senior 4 - 6pm, open: 4.30 to 6pm
Fee: $30 (Pay via edusave if eligible)


Classes are conducted by experience external SMO trainers. There will be classes for each Junior, Senior or Open category. Limited places are available for each class.

Interested students please email njsmotraining@gmail.com the following particulars by 26th Feb, 2010

1. Name
2. NRIC
3. Class
4. Email address
5. Handphone no
6. Category

Good opportunity to improve your Maths skills. Grab it.

Happy Birthday

Jiang Yuan!

have a blessed birthday and loads of fun! x)

HALLLLO!!!

HAPPY BIRTHDAY TO OUR DEAREST SECRETARY!!!!

MAY ALL YOUR WISHES COME TRUE!!! WHATEVER HAPPENS, YOU HAVE MATHS SOCIETY - YOUR SECOND FAMILY :D

ALL THE BESTS FOR UR A-LEVELS (:

WE LOVE U!!! LOTS :D:D:D

Hi everybody

There will be no session this week due to road run

So, see you all again next FRIDAY at 4.30 Sr31 :)

HAPPY RUNNING :D

thinking out of the box :))

Helloooooooooooooooo people. As promised, here are some logic questions, as a follow-up from the session yesterday (19 feb). Have fun thinking logically! xD

Determine the validity of this!

If the maid is innocent, then either the butler is guilty or the butler is a liar. Now there is no doubt that the butler is a liar and the maid is innocent. Therefore, we can be sure that the butler is guilty.

Valid or invalid?

*hint: always convert compound sentences into statements with sentence operators

Use truth tables with these notations!

Let m be the maid is guilty

Let b be the butler is guilty

Let l be the butler is a liar

Try this problem!

Alfred, Kurt and Rudolf are suspected of robbery. They testify under oath as follows:

Alfred : Kurt is guilty and Rudolf is innocent.

Kurt : If Alfred is guilty, then so is Rudolf.

Rudolf : I am innocent but at least one of the others is guilty.

a) Can everyone’s testimony be true?

b) Assuming that everyone is innocent, who committed perjury (lied)?

c) Assuming that everyone’s testimony is true, who is guilty and who is innocent?

d) Assuming that the innocent told the truth and the guilty told lies, who is innocent and who is guilty?

e) The testimony of one of the suspects follows from that of another. Which from which?

HAPPY VALENTINE'S DAY EVERYONE!

MATH SOC LOVES YOU!

Maths Soc Orientation!!!

Hahaha, I hope you guys had a lot of FUUUUN!!! :D:D:D

Above are some of the photos, you may want to have a look or download them. There are 52 of them in total so I can't upload all in this post, so sorryyy! :(

You may want to have a facebook account (in case some of u don't have it) and/or add Mac Hoai Linh on facebook if you want to see all the photos!!! HAHAHAHA!!! =)))

Look forward to see you all again after the holidays!!! Have a great holidays guys! :D

Hi everybody

Sadly, there will be NO SESSION this week (12th Feb) due to CNY celebration. Our next session will be next Friday (18th Feb), 4.30, SR31.

See you all there.

For those who want to practice more for ICMC. You can download some questions from here and practice on your own. More questions will be uploaded if there's enough demand haha :)

Ggood luck and have a good weekend my friends :D

we will have an ORIENTATION this week
Time: 4.40
Venue: Amphi theater
Attire: pe!

We will be playing a lot of games so remember to save your energy and enthusiasm haha

See you all there :D

IT JUST LOOKS FUNNY, DOESN'T IT :D

Anyway. this week session is gonna be at CA6, 4.30 to 6.30
We're going to play around with TANGRAM which involves some cutting and pasting so please remember to bring along some papers okay:D

And as we promise,here's the plan for the first 3 months

Yup, if nothing changes, this will be the official schedule of the first term =) Any changes will e announced here so please check the blog often :)

SEE YOU ALL THIS FRIDAY

HAPPYYYYYYY BIRTHDAY TO OUR DEAREST ALISON!!!

Have a great year ahead with happiness and lots of joy. All the bests for whatever you do!!!

WE LOVE YOU, LOTSSS! :D:D:D

13 january

HAPPY BIRTHDAY to

JANANI KRISHNAN

:D hey you're JH4 now!

jiayou okay we are all behind you! x)

10 january

HAPPY BIRTHDAY to

NG MONG LI CALVIN

:D

have a nice year ahead! x)

28 december

oops! haha wrong way around

HAPPY BIRTHDAY to

CHEN MENGLEI!

:D

and good luck for the rest of the year too! work hard x)

20 december

HAPPY BIRTHDAY to

LU YAOZHI!

our very own training manager

we <3 you!

15 december

a very HAPPY BIRTHDAY to

PEI YU!!

may a new year make your wishes come true!

WE WISH YOU A MERRY CHRISTMAS
WE WISH YOU A MERRY CHRISTMAS
WE WISH YOU A MERRY CHRISTMAS
AND A HAPPY NEW YEAR

We wish you all a wonderful year ahead with great achievements and wonderful time of joy and laughter
We shall work hard together and continue showing the world how awesome we are in the coming year
HAPPY NEW YEAR :D:D

QUIZZZ :D

1. You have a drawer in your bedroom that contains an assortment of black, blue and brown socks. You start randomly taking individual socks out of the drawer, but it's too dark to see what colour socks you have taken. How many socks do you need to take out in order to guarantee that you have got a matching pair?

a. 2
b. 3
c. 4
d. all but 2 of the socks in the drawer!


2. You are standing in front of the bathroom mirror and can see down to your navel. You walk back from the mirror. Can you now see:

a. More of yourself
b. The same amount
c. Less of yourself

3. You are at a wedding with 50 guests. What is the chance that among those guests there are at least two who share a birthday?

a. Almost certain
b. About 50-50
c. About 1 in 7
d. Extremely unlikely

4. Imagine a piece of string has been tied tightly around the earth's equator (assume the earth is a perfect sphere!), with thousands of children stationed around the earth next to the string. You now cut the string at one place, and add in one more metre of string to give it a little 'slack'. By how much can the children around the equator now lift up the string?

a. Not quite enough to squeeze a razor blade under
b. Enough for all simultaneously squeeze their hands under
c. Enough for them to put their fists under
d. Enough for them all to crawl under

5. You are listening to a random news story on the Today programme, which quotes some statistic, such as the number of refugees from a country, a company's profits, or the number of seconds it took a competitor to win a race. What is the chance that the first digit of the statistic is either a 1 or a 2 ?

a. Almost certain
b. About 50-50
c. About 2/9
d. Impossible to answer, depends on the story

6. A man leaves his tent. He walks 1 mile south. Then he walks 1 mile east. Then he walks one mile north. To his surprise, he now discovers that he is back at his tent, and at this moment he spots a bear. What colour is it?

a. Black
b. Brown
c. White
d. Pudsey


If you have any questions, feel free to leave your comment here okay :D

Hey guys, today i came across this interesting problem and i think i should share it with all of you. Actually it's a rather FAMOUS puzzle which, i think, many of you heard about. It's called

THE MONTY HALL PROBLEM!

For the benefit of those who haven't heard about it and those who have heard about it but forgot what it was about, the problem goes like this:

In the 1960s, there was a popular weekly US television quiz show called Let's Make a Deal. Each week, at a certain point in the program, the host, Monty Hall, would present the contestant with three doors. Behind one door was a substantial prize; behind the others there was nothing. Monty asked the contestant to pick a door. Clearly, the chance of the contestant choosing the door with the prize was 1 in 3.

So far so good?

Now comes the twist. Instead of simply opening the chosen door to reveal what lay behind, Monty would open one of the two doors the contestant had not chosen, revealing that it did not hide the prize. (Since Monty knew where the prize was, he could always do this.) He then offered the contestant the opportunity of either sticking with their original choice of door, or else switching it for the other unopened door.

The question now is, does it make any difference to the contestant's chances of winning to switch, or might they just as well stick with the door they have already chosen?

Well, most people think that it makes no difference if they switch. Here is their reason:

"There are two unopened doors. The prize is behind one of them. The probability that it is behind the one I picked is 1/2, the probability that it is behind the one I didn't is also 1/2, so it makes no difference if I switch."

HOWEVER THAT EXPLAINATION IS WRONG!!
Why is it so??

Try to think about it before you look at the full and correct explaination here

The hint is "Switching actually DOUBLES the contestant's chance of winning"
Interesting??



Definitely!! Enjoy :D

some of the birthdays we have missed on this blog..

xuling

tiffany

dat

wen cong

... HAPPY BELATED BIRTHDAY! ;D

HI EVERYONE :D

So finally promos, assessment week, pw...everything is over

Let's all take a good rest this holiday and enjoy yourself to the max :D However don't forget to complete your holiday homework okay

I promise you we will have an exciting year awaits us with a lot of exciting activities, competitions and events. Do look out for the notices which will be updated regularly on the blog.

See you all =)

AUSTRALIAN MATHEMATICS COMEPTITION RESULT

Year 9I

High distinction:

LIU KANGXIN
LE MINH NHAT (Prudence Award)
NGUYEN ANH TUONG
NGUYEN NHI ANH TRI
ZHANG RUIZHI

Distinction:

DO ANH TU
REN YI

Year 10I

Distinction:

NGUYEN PHU LAM
MAC HOAI LINH

Year 11S

High distinction:

NGUYEN QUI HIEU
LU YAOZHI

Distinction:

DANG HOAI PHI
CAO LUU QUANG
TANG NINGRUI
NGUYEN ANH KHOA
WANG XULING
BUI HAI MINH
TAN JUN SHING, EDMUND
- LIM WEN CONG

Year 12S
Distinction:

LI CHUN
XIAO XUE

Congratulations to all the winners :D:D
AMC next year will be held on 5th of August so there's plenty of time left for you to practice
Let's try harder next year and aim higher okay =)

Maths Soc - Burning with passion

For all the Maths-lover, i've uploaded some challenging questions for you to practice.You can download them here
Answers for those questions can be downloaded there ----------------> =)

Enjoy :D

Hi everybody
Are you all enjoying your holiday :)
I know there's a HUGE amount of homework to finish but at the same time, try not to forget the meaning of the word "HOLIDAY" okay =D
I've also uploaded the slides for last session here, if you have some free time you can just play around with your Mobius Band haha :D:D
Alright, remember to spend your holiday wisely okay, we'll see each other sooooon :D

*******************
Beauty of Maths

1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 98765
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321

1 x 9 + 2 = 11
12 x 9 + 3 = 111
123 x 9 + 4 = 1111
1234 x 9 + 5 = 11111
12345 x 9 + 6 = 111111
123456 x 9 + 7 = 1111111
1234567 x 9 + 8 = 11111111
12345678 x 9 + 9 = 111111111
123456789 x 9 +10= 1111111111

9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888

Brilliant, isn't it?

And finally, take a look at this symmetry:

1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111 = 12345678987654321

Yes MATHS is really like that - Full of wonders.

You should also know the POWER OF 9.

Anything multiplied by 9 , it's sum total is 9.

For example, 62 * 9 = 558; 5 + 5 + 8 =18; 1+ 8 =9!
Just give it a try =)

Ever heard of this equation : e^iπ + 1 = 0 ?

It relates the five most fundamental constants in mathematics,

e and π are both transcendental and i is imaginary and yet they combine with 1 to make 0!

How wonderful <3

Hi everybody
We will have our last official session this friday (4th Sept) 5.30-7.30pm
The venue is LT1
Please bring along somg paper, pencil, scissors and glue/tape!! We're gonna do some cutting and pasting for this session =)
Please be there on time :)


There will be no more sessions in Term 4 as CCA activity has been totally disallowed =( However, online materials will be prepared occasionally to be disseminated to members.
So please take this opportunity to revise for your coming Assessment Weeks, Promos okay
See ya all sooon :D

**********
For those who are very bored with all the regular Maths lessons we learn in school, here are something you may find interesting


Russell's paradox:
The set M is the set of all sets that do not contain themselves as members. Does M contain itself?


If it does, it is not a member of M according to the definition.
If it does not, then it has to be a member of M, again according to the definition of M.
Therefore, the statements "M is a member of M " and "M is not a member of M " both lead to contradictions.


So what's the answer to this question?


Find more about this interesting Paradox here

Guess whose birthday it is!?

our very own president...

BUI HAI MINH!

HAPPY 18TH BIRTHDAY

WOW

now you're of legal age..

which means

you're growing older hehehe

stay beautiful and

have a nice year ahead!

HI EVERYBODY
HERE'S OUR PLAN FOR AUGUST!!

Our coming session will be this Friday 14th of August, 5.30 to 7pm in LT1
We'll be doing Game Theory which is a veryy interesting topic. I think it doesn't sound very familiar to many of you right (:
Anyway please come punctually at 5.30 sharp.
SEE YOU THERE :D

***********

Congratulations to YiXuan for successfully getting to the Final Round of the Sudoku Master
We hope you all the best for this competition.
Remember if you have any trouble just think of us and you will see the solution much faster haha
GOOD LUCK YIXUAN
YOU ROCK =)