Your Guru on Sunday Times!

Your Guru appeared on Sunday Times today! (28th Dec)
Go check it out!

Block test reminder

Hi dear 4N1 (2009),

you will have block tests from 5th Jan onwards.
Please be prepared!

E Math topics:
1. Matrix
2. Completing the square

A Math topic:
--taken from your holiday assignment.

Miss you all and looking forward to seeing you all on 2nd Jan (Friday).
Please ensure your attire and hair style is correct.
Spread around the news: school begins on 2nd Jan, NOT 5th! 7:15am!

See you all!

As requested by Enze (Set C ME12Q8)

I will help you a little bit...


Then solve...

Emergency Qn for A Math Set 3

Dear Madam Lo,
I have problem on A math hw set3 Q8
Just forget how to do

ENZE 敬上

empty class radio....

the class radio is so empty. it seems like no one visited...
i will not be turning on the radio unless more then 7 people comment this post or using the chat box.... the radio is currently closed down...

Your Guru is back!

Dear people,

I have been on a learning journey in Jiangnan （江南）, China.
Now I have been back, it is time to get down to serious work.

1. Preparing lessons for 2009.
2. Preparing your Test papers for Block test 1 for both E Math and A Math.

Your duties:
1. Complete your Holiday assignments.
2. Prepare for your block tests.

Answer this detective question.... anyone?

A woman, while at the funeral of her own mother, met this guy whom she did not know. She thought this guy was amazing, so much her dream guy she believed him to be, that she fell in love with him right there but never asked for his number and could not find him. A few days later she killed her sister.

Question: What is her motive in killing her sister?

Solution to Bjorn's question.

The question.

Since no one is willing to post their solutions, I will reveal the answers.

Read carefully, your Guru speaks!

Firstly, the calculation is erroneous. I am using a counter-example,

You should not do 3 x $9 + $2 = $29.
What if the owner gave back $10 and the bellboy pocketed $1, leaving $9 to be shared among the three? Each will get $3 back, hence each paid only $7.
3 x $7 + $1 = $22. What happened to the $8?

In fact, we should look at only the cost of the room.
In the original question, the room cost $25. $25 = 3 x $9 - $2 (each paid $9 and $25 goes to the room, $2 to the bellboy)

In my counter example, the room cost $20. $20 = 3 x $7 - $1

See?

class radio??

i m trying to make a class radio station to play some songs or something...
the link will b post as soon as possible
and those who wan to help with the radio station can post a comment

EDIT:this is the link to the radio www.4n1radio.blogspot.com
u need to download an add on,plug-in to listen

btw this radio will onli be playing music for the time being because i dont have a mic..
this radio station is also recruiting ppl to take over... if u wan to help u can post a comment

NOTE: the radio will onli b playing song when i m online , but dun worry i will be online most of the time

try this question i found^^

this blog no ppl post things de... so i start posting first

* 3 guys rented a hotel room that cost RM30 per night. So the 3 guys paid RM30 to the cashier.
* Which means, each of them coughed up RM10 to pay for it.
* However, the hotel was having some sort of promotion that night, and the room only cost RM25 per night.
* So the cashier handed over RM5 to a bellboy asking him to refund the 3 guys.
* Out of greed, the bellboy secretly pocket RM2 out of the RM5, and then returned RM3 to the 3 guys.
* Having returned RM3, each guy then took back RM1.
* So, in total, each guy paid RM9.


Here's the equation:

Each guy paid RM9.
RM9 x 3 = RM27

The bellboy pocket RM2.
RM27 + RM2 = RM29

So where did the remaining RM1 go?

As Requested by Arif

Dear Arif and all 4N1s (2009), to ask questions regarding a particular topic, you need to create a new post and preferably if you can , type the question here or embed the question as a picture file. Then I will give tips as comments.

anyway, here are the clues to Set A Q4-5







Can you see the patterns? For more info., refer to ch. 6 of your textbook.

E Math Holiday Homework

Complete all the following questions from your 4A Math textbook. Show all your workings neatly and clearly on fullscap paper and hand them in on the first day of school.

Ex. 3.1 (p.64-66)

Q2, Q4, Q7, Q8, Q9, Q10, Q11

Ex. 3.2 (p.71-72)

Q1-6

Ex. 3.3 (p. 74-77)

Q1, Q3, Q5, Q7, Q10, Q11

Ex. 3.4 (p. 83-86)

Q1, Q2, Q3, Q5, Q7-10

Additional Math Homework

There are 3 sets of holiday assignment.
Do them neatly on fullscap paper. They will be collected on 1st day of school 2009.


Set A:
Complete all the following questions.
You may either copy and print out the questions, or copy the questions.

Q1 Solve the simultaneous equations:



Q2

Q3

Q4 Solve 4x^3 + 3x^2 - 16x - 12=0

Q5 Write down and simplify the first 5 terms of the binomial expansion (5x-3)^8.


Set B
All the questions are from your textbook.
ME 7 p. 161-163
Q1, Q2, Q8
ME 10 p. 217-219
Q1, Q2, Q6

Set C
All the questions are from your textbook.
ME 12 p. 268-271
Q3, Q8, Q11

RE5 p. 134-135
Q1, Q3, Q5

If you have difficulties solving the questions, please post your queries here.
I will try my best to answer your questions.
Please ask your questions by 20Dec so that I have time to answer.

Group 4 (louis)

During a race there are 5 drivers named, Takumi , zero , Kaname , Yuuki and Kira who drove their car , mazda rx-7 ,mazda rx-8 ,nissan skyline ,mitsubishi evolution9 and Lamborghini gallardo respectively .Through asia starting from Singapore to Indonesia. The table below show the amount of petrol used per kilometer and the time taken for the race.
A) The cars needs to use the amount of petrol above. Form 2 matrices so that the matrix product can find the total distance in kilometer. Hence, find the average speed.

B) Calculate the total cost of the petrol in dollars used if 1 litre of the petrol cost $2.20.

Matrix Competition: group 8

A group of singer album their songs into three different album such as the DBSK, TVXQ and Tohoshinki. Their album was ordered by four factory from different country at the table shown below.
a) Write down 2 matrices such that the product gives the total amount of price
for each shop.
b) Find the total amount of money needed to pay the album in
a month.
i) The price of the album are in Sing $.Hence find the price in Rupiah when 1Sing$ =
7.800 rupiah.

Matrix competition group 10

3 teachers, mdm lo, mr sng and miss tan were in the moe website for the best teachers award they were judged as follows:
mdm lo has 300 votes for students 15 votes from staffs 300 votes from moe users and 30 votes from others respectively.
mr sng has 200 from students,25 from staffs,200 from moe and 20 from others respectively while
miss tan has 100 from students,10 from staffs,50 from moe users and 5 from others. The cost of votes is $0.30 per student,$0.20 per staff, $0.10 per moe user and $1.00 for others.
a)write down two matrices such as the to find the total cost of votes
b) the company made a mistake and increase the cost of votes increase by 10% the last minute,calculate the new matrix using a scalar.

matrix competition group 5 (usman!!)

The world consists ofthree major terrorists group, the group are called JM members, talibang and AL-qaeda.They use different types of bombs to bomb a country which are shown below in the table.

The cost of one siao bomb is $64, one cost of lame bomb is $120, one cost of babi bomb is $95 and the cost of one cow bomb is double of the cost of siao bomb.

i)Write down two matrices such that the matrix multiplication give the price of bomb per terrorising a country.

ii)The JM memeber then got to know that half of their babi bomb was fake.Find the total price of all the three terrorist group atfer they have bomb a total of 7 countries.

Matrix competition group 11:check lam

During a kill,person A,B and C seperate their organs.the average number orders for heart(H),
intestines(I), lung(L) and bone(B) for each kill were as follows:

Person A:20(H), 30(I), 60(L), 10(B)
Person B:30(H), 50(I), 80(L), 20(B)
Person C:60(H), 80(I), 90(L), 50(B)

The cost of each heart, intestines, lung and bone was $500, $300, $400 and $800 respectively in s'pore. $600(H), $400(I), $300(L) and $500(B) in Japan. $400(H), $600(I), $200(L), $500(B) in USA. Find

a)the cost of organs they seperate in s'pore.

b)the total cost of organs they seperate for each person in all the countries.

Matrix Competition MENG HWEE's Group 7

7) During the check ups, there are three hospitals, Metal hospital, 2K hospital and Fairy hospital. The table shown below is the sale of the blood.





(a) Write down two matrices such that matrix multiplication, will give the total price of the blood per hospital.
(b) By using matrix multiplication thrice, find the differences between the money earned between November and December per hospital.
(c) If there is an increased of 20% of the number of test tubes sold in December, what is the total amount of the test tubes sold in December?

Matrix competition group 2 (Lediana)

A fashion factory produces clothes in 4 types and delivers them to three shops. the types of the clothes are dresses (d), T-shirt (T) pants (p) and skirt (S)

Giordano receives 15 of (d), 30 of (T), 10 of (p), 8 of (s)
Hang ten receives 20 of (d), 35 of (T), 12 of (p), 10 of (s)
Baleno receives of 18 (d), 40 of (T), 15 of (p), 6 of (s)

The cost of one dress, T-shirt, pant and skirt are $14.00, $8.00, $16.00 and $13.00 respectively. They made deliveries to each store in one week. Giordano has 5 deliveries, Hang ten has 8 deliveries, and Baleno has 11 deliveries.

(i). Write down two matrices, such that the elements of their product, under matrix multiplication will give the cost of the clothes delivered to each store per delivery. Find the product of these matrices.

(ii). Write down two matrices such that the elements of their product under matrix multiplication, will give the total number of clothes of each type leaving the factory in one week. obtain the product and write down the total number of clothes supply by the factory in one week time.