mathe-holic!

2008-03-19T11:16:00.002+07:00

heyy sweets, sorry i havent been updating in this little space for a while.. it's not dead yet so dont worry. =) how's school? aniwae, just thought i'd post up some math jokes and online games for you guys to try out if you're feeling bored or stressed out (which i dont think you'll be) so feel free to click on the links! =) miss ya.

links:
http://childparenting.about.com/od/mathgamesonline/
http://www.doe.virginia.gov/Div/Winchester/jhhs/math/puzzles/games/g3.html

The Top Three Excuses For Not Doing Your Math Homework (since im not teaching you animore haha)

#3. I'm taking physics and the homework in there seemed to involve math, so I thought I could just do that instead.
#2. I have a solar powered calculator and it was cloudy.
#1. It was Einstein's birthday and pi day and we had this big celebration! (This only works for March 14)

sec1 math trail

2008-03-09T11:08:00.002+07:00

hello sweets! here's a reminder for the math trail on wednesday (12 march)
reporting time: 0900
dresscode: pe tshirt and shorts/skirt
things to bring: water bottle, poncho/raincoat/umbrella, writing materials (pen and pencil)
seeya!

homework list! for sec 2s

2008-03-01T20:03:00.002+07:00

hey guys, here's a list of ALL the homework i've given you all this year. please check you have done them, at least before mrs tan comes back.

Homework 1 (Exercise book 1)
Sec 2B TB:
Class Activity 1 Q2,3
Ex 10.1 Q2,3,4
Pg 104 TRY IT 4
Pg 105 TRY IT 5
Ex 10.2 Q1,7

Homework 2 (Exercise book 2)
Sec 2B TB:
Pg 114 Ex 10.3 Q8,9
Pg 127 Ex 10.5 Q2(b)
Pg. 131 Revision Exercise Q2,3,6,7,8

Class Test 1 [please file]
Corrections!

Homework 3 (Exercise book 1)
Sec 3A TB:
[the indices questions that i copied out for you]

Extra Practice (not compulsory) [please file]
Indices and Standard Form

Worksheet [please file]
Indices and Standard Form

Worksheet (done in exercise book 1) [please file]
Scales and Map

Homework 4 (Exercise book 2)
Sec 2A TB:
Ex 1.2 Q2, 3, 5, 6, 8
Ex 1.3 Q2, 3, 4, 5, 6, 8

Class Test 2 [please file]
Corrections!

Revision Worksheet 1 (CNY Holiday Homework) [please file]

Revision Worksheet 2 (CNY Holiday Homework) [please file]

Proportion Worksheet [please file]

Homework 5 (Exercise book 1)
Sec 2A TB:
(algebraic expansion and factorization – I can’t remember the questions and I don’t have my tb with me. Will update the questions on Monday)

Proportion Revision Worksheet [please file]

Mock Common Test Paper [please file]

Revision Worksheet 3 [please file]

Math Poem!

2008-02-28T21:14:00.000+07:00

What are the Factors of Mabel?

Our Mabel has saved up her dimes
To purchase a table of primes.
We never thought Mabel
Would need a prime table --
Perhaps it's a sign of the times.

Sec 2 Revision Worksheet 3

2008-02-25T18:48:00.003+07:00

just in case for some reason or another your copy of revision paper 3 vanished into thin air,
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20RevisionPaper%203.doc

and heres the updated version of the mock test solutions
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20Solutions%20for%20Mock%20Common%20Test%20Paper.doc

relax!

2008-02-25T18:19:00.003+07:00

hello there! i believe you should all be mugging now.. if you do have any problems im just a phone call away! and you're only charged for the phone bill. =) and just for you guys i'll stay up tonight.
anyway whilst you're hard at work and stressing out, i happen to chance upon this and i thought was really funny. take some time off to rest once in a while ya!
TOP 8 LIST OF PICK-UP LINES TO USE ON MATH CHICKS
#8. Are you a differentiable function? Because I'd like to be tangent to your curves!
#7. I'm not being obtuse but you're acute girl.
#6. I'll love you from here to infinity.
#5. You've got the curves, I've got the angles.
#4. Honey, you're sweeter than 3.14.
#3. You fascinate me more than the Fundamental Theorem of Calculus.
#2. My love for you is like the slope of a concave up function because it is always increasing.
#1. I am equivalent to the Empty Set when you are not with me.
happy mugging!

Sec2 mocktest solutions

2008-02-22T20:09:00.000+07:00

201 205 208 please check! =)
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20Solutions%20for%20Mock%20Common%20Test%20Paper.doc

Sec 2 Proportion Revision Handout

2008-02-20T19:06:00.002+07:00

Revision for common test (Proportion)
http://www.fileden.com/files/2008/1/29/1727174/Sec2_proportion_revision%5B1%5D.doc

Important! for sec 2s

2008-02-19T18:33:00.004+07:00

heyy.. please take note of the erratum in your solutions to revision worksheets 1 and 2. i've uploaded new versions of each so please take a look. if you've already printed the previous one, not to worry.. the updated questions are highlighted in red so you can just make changes on your hard copy yourself ya?
Revision Paper 2 (indices and standard form)
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20RevisionPaper2answers.doc
Revision Paper 1 (data analysis)
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20RevisionPaper1solutions.doc

goodluck!

2008-02-16T20:21:00.003+07:00

heyy. before i forget and since i dont see you guys any time before your common test starts on monday morning, ALL THE BEST! remember to relax and not panic ok? you'll do much better that way. and if you still have any questions for math, im always a phonecall away! remember there's no such thing as a stupid question, just ask whatever you need to ask, don't be shy. Besides, none of you are stupid. Let me share this with you, my aunt told my little cousin if he calls anyone stupid (which is some weird habit he picked up in school) he has to pull his ears.

ok, so remember CONSULTATION is FREE! i promise i won't charge. Good luck!

Solutions for Sec 2 (updated)

2008-02-16T12:43:00.004+07:00

by special request, for 201, 205 and 208 =)
Solutions to Class Test 2
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20ClassTest2%20solutions.doc
Solutions to Proportion Ws (CNY Holiday Homework)
http://www.fileden.com/files/2008/1/29/1727174/Solutions%20to%20Proportion.doc
Solutions to Proportion Revision Worksheet (the one i went through in class)
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20ProportionRevisionWS%20solutions.doc
Solutions to Revision Worksheet One - Data Analysis (CNY Holiday Homework)
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20RevisionPaper1solutions.doc
Solutions to Revision Worksheet Two - Indices and Standard Form (CNY Holiday Homework)
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20RevisionPaper2answers.doc

Common Test Details (Sec1 and Sec2)

2008-02-16T07:57:00.003+07:00

heyy sweets, just to confirm the format of the common test paper..

Secondary 1
Time: 1 hour
Day/Date: Tuesday 26 Feb 2008
Topics tested: Factors and Multiples, Real Numbers (excluding the part on the use of calculators)
NO CALCULATORS ALLOWED
the standard should be like the class test you had so please buck up!

Secondary 2
Time: 1 hour
Day/Date: 26 Feb 2008
Topics tested: Data Anaysis (stem-and-leaf, dot diagram, meanmedianmode), Indices and Standard Form, Proportion (scaleandmap, direct, inverse), Algebraic Expansion and Factorisation (excluding chapter 2.4 cross method)
NO CALCULATORS ALLOWED
bulk of the marks will probably be allocated for proportion so make sure you are pro at it! =)

Sec 1 Class Test Solutions

2008-02-14T18:03:00.003+07:00

heyy! here's the marking scheme for the math test 1! specially put up for yiqing, but for the rest, please refer to it to find out what the correct answers are if you have been daydreaming in class! i probably will not put up the answers to the 2007 common test paper so you'll have to pay attention.. happy valentine's day! <3

http://www.fileden.com/files/2008/1/29/1727174/S1_Math_Test_answers%5B1%5D.doc

Sec1 Extra Practices and Answers

2008-02-06T12:41:00.000+07:00

heyy sec 104!
i know you guys have not done very well for this test.. but it's alright! don't brood over it already okay. if you did relatively well, keep up the good work.. but if you didn't, now's the time to revise all your concepts again and DO LOTS OF PRACTICE before your common test in week 8 (it's week 6 now btw). jia you! i know you all can do it!
anyway, i'll be away in malaysia during these four days so i've come up with 2 extra practices for you to do while you get a break from school.. please try these questions and check the answers. it isn't compulsory for you to hand in, but if you have any problems with getting the answers please approach me! =) happy holidays and happy chinese new year!

Factors and Multiples Extra Practice
http://www.fileden.com/files/2008/1/29/1727174/Sec1%20WS%20HCF%20and%20LCM.doc
Factors and Multiples Extra Practice (answers)
http://www.fileden.com/files/2008/1/29/1727174/Sec1%20WS%20HCF%20and%20LCM%20answers.doc
Real Numbers
http://www.fileden.com/files/2008/1/29/1727174/sec1%20Real%20Numbers%20extraprac.doc
Real Numbers (answers)
http://www.fileden.com/files/2008/1/29/1727174/sec1%20Real%20Numbers%20extraprac%20answers.doc

2008-02-02T18:18:00.000+07:00

heyy! just for your information, im going to conduct extra lessons or remedial classes for my secondary twos from monday (4th feb) onwards. the classes will start at 2.45 everyday except wednesday which will start at 2. it is not compulsory for everyone to turn up, just those who think they need help with any of the concepts we've gone through. take note. though, there'll be no extra classes from wednesday (6th feb) to sunday (10feb) because i'll be away in malaysia. =)

Math Articles (just for enrichment)

2008-02-01T13:48:00.001+07:00

related topics: data analysis - mean, median, mode

ARTICLE ONE: INCREASING THE AVERAGE
In Martin Luther King Jr. School, the average iQ of the first-graders is 115. Rosa has an IQ of 110 and is in the first grade of Martin Luther King Jr. School. Her family moves out of the school district, and Rosa enrolls at Jefferson School, where the average IQ of the first-graders is 105. When Rosa leaves the first grade of Martin Luther King Jr. School, the average IQ of that class rises a little because Rosa's IQ was below the class average. When Rosa enrolls in Jefferson School, the average IQ of her new first-grade class also rises because Rosa's IQ is above the class average. Is moving Rosa a way to increase the intelligence of the first-graders of the two schools?

Explanation
Rosa's move did not change her IQ, and it did not change the overall average IQ of the first-graders at the two schools taken together. The two averages of the separate classes increased, but only because that is the way averages can behave. Averages tell the truth and nothing but the truth - but they may not tell the whole truth. And sometimes the truth they tell is not very useful.

ARTICLE TWO: HALF THE WORLD IS STUPID?
A headline of a tabloid newspaper article reads, "Half the World is Stupid!" The article begins with the statement, "As much as 50% of the world's population has a below-average IQ score!" Do you find this statement disturbing? Why?

Explanation
The statement is true and should not be regarded as disturbing. According to convention, the average IQ score is 100. This measurement of 100 is the average in two senses. Not only is it an arithmetic mean, obtained by adding up all individual IQ scores and dividing the sum by the number of people tested, it is also a median, separating the population into two equal halves. Thus it is quite true that half the population has a below average IQ score and half the population has an above average IQ score. This example of what average means is valid in this, and in many other, contexts. Researchers and scholars continue to debate what IQ scores really mean, and for that matter, what "intelligence" is. The fact that a certain psychological measurement is labeled an intelligence in every sense of the word. Additionally, it does not follow that if a person's IQ is below 100, then he or she is "stupid". Even if we accept (and some don't) that an IQ score is an accurate measurement of some human quality, we must recognize that it is a measurement from which sociopolitical conclusions should be drawn with considerable reservations.

Sec 1 Resources to Class Test 1

2008-01-31T13:26:00.000+07:00

heyy! please take a look at the following documents especially if you have been daydreaming in class!

Solutions to Extra Practice (word problems)
http://www.fileden.com/files/2008/1/29/1727174/Sec1%20extraprac%20solutions.doc

Quick Revision on Chapters 1 and 2 for Class Test
http://www.fileden.com/files/2008/1/29/1727174/sec1%20classtestrevision.doc

Good luck for your test! =)

Large Numbers (interesting facts for enrichment)

2008-01-30T20:45:00.000+07:00

Related topics: Indices

New terms
googol = the figure 1 followed by 100 zeros,
i.e. 1 googol = 10^100
googolplex = the figure 1 followed by a googol of zeros,
i.e. 1 googolplex = 10^googol = 10^10^100

Other interesting facts about large numbers
10^16 = estimated total number of words spoken since the beginning of talk

10^30 = estimated number of snow crystals needed to form the Ice Age

10^79 = estimated number of electrons in the universe

10^10^50 = number of possible moves in a game of chess

Puzzle Problems 2

2008-01-30T20:29:00.000+07:00

For all
Express each of the numerals

1, 2, 3, 4, 5, 6, 7, 8, 9, 10

using EXACTLY FOUR 4S. You may use operation symbols (+, -, etc.), square root symbols, but you MUST use exactly FOUR 4S and NO OTHER DIGITS in your representations.

For Sec Ones only
Related topics: Real Numbers

Arrange the nine digits

1, 2, 3, 4, 5, 6, 7, 8, 9

in order from left to right inserting + and - signs only so as to produce a result of 100.

For example, 12 + 345 - ... etc.

For Sec Twos only
Related topics: Indices

Express the number 1 using each of the nine digits

1, 2, 3, 4, 5, 6, 7, 8, 9

exactly once!

Puzzle Problems 1

2008-01-30T20:10:00.000+07:00

heyy! here are just some puzzle problems i came across so i thought i'd share with you guys. If you think you know the answer, please tag by clicking the comments link. The winner gets a small prize!

For Sec Ones only
Related topic: Real Numbers
Can you insert parentheses (brackets) so as to make the statement below true?

3 + 18 ÷ 2 + 5 - 16 ÷ 2 x 4 + 5 = 6

For Sec Twos Only
Related topic: Indices
What is the last digit in the number 7^1000 (seven to the power of 1000)?

For All
A teacher assigned homework to his class and told the students that on each day after the first, they must do twice the number of problems that they had done so far. If at the end of 5 days, the students had completed one-third of the problems, how long will it take them to do all their problems?

Math Comics

2008-01-29T21:03:00.000+07:00

Reference http://w3.impa.br/~jgomes/comics/comics.html

Revision for Class Test 2 (Important Points to take note)

2008-01-29T17:02:00.000+07:00

Just some revision in case YOU WEREN'T LISTENING DURING MY LESSON

Data Analysis
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20dataanalysisrevision.doc

Indices
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20Indices%20Revision.doc

Standard Form
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20standardformrevision.doc

Indices Extra Practice 2
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20indicesextra2.doc

Sec 2 Practice Solutions and Answers

2008-01-29T16:57:00.000+07:00

heyy. here are the answers/solutions to the worksheets and practices that i gave you. For all the indices practices, only answers are available. Please check if you can work out the answers correctly. If you don't know how to work out the steps, please feel free to approach me for extra classes.

Data Analysis Extra Practice
http://www.fileden.com/files/2008/1/29/1727174/sec2%20dataanlysisextra.doc

Indices - Class Test 1
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20classtest1answers.doc

Indices and Standard Form WS

http://www.fileden.com/files/2008/1/29/1727174/Sec2%20indiceswsanswers.doc

Indices Extra Practice 1
http://www.fileden.com/files/2008/1/29/1727174/Sec2%20indicesextra1answers.doc

Math Article (just for enrichment)

2008-01-29T05:03:00.000+07:00

related topic(s): proportion

ScienceDaily (Jan. 7, 2008) — Ecologists generally observe a positive relationship between sizes of predators and their prey, mainly because predators need to be large to eat a larger prey.

But does this positive relationship hold for sizes of bacteria and their food molecules? Using a mathematical model, scientists at Michigan State University predict the opposite, an inverse relationship between sizes of bacteria and their resource molecules.

Theoretical biologists Kohei Yoshyama and Chris Klausmeier tweaked a model of bacterial growth in an aqueous medium to account for resource transport from medium to the cell surface by molecular diffusion together with biological uptake processes, and derived a negative relationship between sizes of resource molecule and bacterial cell that is most efficient in the resource competition.

They also showed that two bacterial consumers can coexist on two resources that are identical except for their sizes. This result implies that size differences of resource molecules, regardless of the quality, can promote microbial diversity.

"Theoretically, smaller cells are more favored under transport limitation for resource uptake than under limitations by biological processes, such as membrane uptake or catalysis within cells. As resource molecules become smaller, the molecular diffusion speeds up. And then the transport limitation for resource uptake is relaxed, and the optimal cell size becomes larger," states Kohei Yoshiyama, the study's leading author.

He adds, "Species diversity, at least at stable environments, is constrained by number of resources, which previously considered to be finite. Our results add a new dimension to the concept of 'resource', making the number of resources infinite."

The study "Optimal cell size for resource uptake in fluids: a new facet of resource competition" authored by Kohei Yoshiyama and Christopher A. Klausmeier (Michigan State University) was published in the January issue of the American Naturalist.

Reference:
University of Chicago Press Journals (2008, January 7). Big Predators May Need Large Size

Sec 1 Announcements

2008-01-29T04:08:00.000+07:00

Homework
You guys have been angels and I havent had problems collecting homework so well done!

Class Test 1
Friday (1/2)
Topics Tested
Chapter 1 Factors and Multiples
Chapter 2 Real Numbers

*Get Well Soon Hannah!*

Sec 2 Announcements

2008-01-29T04:00:00.000+07:00

Class Test 1 corrections, Indices Extra Practice (compulsory for some), Indices and S.F. WS
Please take not that the deadlines for all my classes for these 3 assignments are by Tuesday (29/1)

Class Test 2
Topics Tested
Data Analysis
Indices
Standard Form
Test format
8 questions
50 minutes
30 marks
Calculators allowed

Map and Scale WS
Please do questions on exercise book 1
Deadline: Friday (1/2)

Map and Scale Project
Deadline: Thursday (31/1)

Sec 2 Homework (to be done on exercise book)

2008-01-29T03:32:00.000+07:00

in case you guys are confused as to what homework we've had so far, here's the list. please take note of the list of students who havent handed in.

Homework 1 (Exercise book 1)
Sec 2B TB:
Class Activity 1 Q2,3
Ex 10.1 Q2,3,4
Pg 104 TRY IT 4
Pg 105 TRY IT 5
Ex 10.2 Q1,7

Students who have not handed in are:
SEC 205
Lau Jia Ying
Lim Jing Kai
SEC 208
Carissa Lim
Ong Xin
Benjamin Siau Yikang
Joel Lim
Poh Wei Jian
Zhao Qinsi

Homework 2 (Exercise book 2)
Sec 2B TB:
Pg 114 Ex 10.3 Q8,9
Pg 127 Ex 10.5 Q2(b)
Pg. 131 Revision Exercise Q2,3,6,7,8

Students who have not handed in are:
SEC 201
Weng Ruiwu
Perry Wang Zhiming
SEC 205
Teiw Jia Hwee
Chua Jun Xian
Lim Jing Kai**
SEC 208
Alicia Kho
Carissa Lim**
Poh Wei Jian**
Zhao Qinsi**

Homework 3 (Exercise book 1)
Sec 3A TB:
[the indices questions that i copied out for you]

Students who have not handed in are:
SEC 201
Ong Chin Ngee
Tan Jun Leong
SEC 205
Dorothy Goh
Hu Xiaoyuan
Lau Jia Ying**
Denise Lim
Hayati
Zou Jiayun
Chua Jun Xian**
Neo Shi Wei
Ong Zheng Yao
Wang Yuzhe
SEC 208
Alicia Kho**
Carissa Lim***
Ong Swee Joo
Ong Xin**
Pearlie Chan Xin Hong
Benjamin Siau Yikang**
Kelmond Ng Jian Sheng
Loh Ming Yang
Poh Wei Jian***
Zhao Qinsi***

hello!

2008-01-28T21:51:00.000+07:00

a note to my sec 104, 201, 205 and 208 students:

heyy there! i've decided to set up this blog specially for you guys! what you'll find here are:

1. extra extra math practice questions (yes! this is in addition to all the other math practices that i'll give you in class! but dont worry the practices here are optional =))

2. additional resource materials that you may like to refer to (e.g. brainpop.com, and other mathematics websites)

3. interesting mathematics-related articles (just for enrichment)

4. answers to class practices and tests

5. LISTS OF THOSE PEOPLE WHO OWE ME HOMEWORK.

alright. this is just another means by which i can communicate with you guys. happy mugging!