Tuesday, 11 August 2015

Wednesday, 15 July 2015

I wish I can be slimmer and taller!

Statistical Analysis - Data Collection and Analysis with measurements for central tendency

What does the data set say about your perception of your own weight and height?

Monday, 18 May 2015

The brick walls

“The brick walls are there for a reason. The brick walls are not there to keep us out. The brick walls are there to give us a chance to show how badly we want something. Because the brick walls are there to stop the people who don’t want it badly enough. They’re there to stop the other people.” 
― Randy PauschThe Last Lecture

Wednesday, 8 April 2015

On Factorisation of quadratic expression using cross method

Introduction to Solving Linear Equations

  1. What must I do to balance the scale again if an operation (+,-, /, x) disrupted the balance?
  2. Is there a pattern to systematically solve any linear equation? What do you notice about the both sides the step before you are about to solve the equation

3. In the second video, why did the left-hand side of the weighing scale goes up when I added 3x to it?

Friday, 6 March 2015

Algebraic Expansion involving binomials (and trinomials)

Recap: What is distributive law (of multiplication of addition/subtraction)?

Use distributive law to expand and simplify 5x(2x-3y). 

Challenge: Expand and simplify (x+2)(x+3).

 Visit goo.gl/bsr3 Visualise the expansion of (x+2)(x+3).

 Example: For (x+3)(x+3), we have


Hence (x+3)^2 = x^2 + 6x + 9.

Thursday, 12 February 2015

A little activity

Try this little activity I created in Scratch and give me your comment.


Sunday, 1 February 2015

The Guessing Game

  • Visit http://goo.gl/QOJAtZ
  • Choose “Multiply Tens” for Game Type.
  • Score as much as possible within the timeframe of the game.

  • Screen capture and post your scores in the comments below.

Estimation in News Article

  • Identify one exact figure and one approximated figure.
  • Explain why do you think these figures are exact / approximated.

On your own, identify a piece of Singapore news from a local online news portal (e.g. Today Online, Channel NewsAsia) that features both exact and approximated figures.

Thursday, 22 January 2015

Error Analysis 1.02


Error Analysis

What is wrong with this working?

Quiz on Prime Numbers

Link to responses

Classification of Numbers

Group 1:
Students with index number that is a prime less than 10 or greater than 20.
Names: 2,3,5,7,23

Group 2:
Students with index number which is a non-perfect square that is an even number between 10 and 24.
Names: 12, 14, 18, 20, 22

Group 3:
Students with index number that is an even number greater than 6 and less than 12, or an odd number from 11 to 15.
Names: 8,10, 11, 13, 15

Group 4:
Students with index number that has a odd number of factors:
Names: 1, 4, 9, 16, 25

Group 5:
Students that are not in group 1, 2, 3 nor 4.
Names: 6,17,19, 21, 24

Classification of Numbers

Monday, 19 January 2015

[For Action] Video to watch before tomorrow's lesson

Please watch the following video before Mathematics Lesson tomorrow. I will skim through some important points, but will not play the full video.

Also, reminder to submit assignment 1.2 tomorrow[Tuesday 20 Jan 2015].

Tuesday, 13 January 2015

The Smart Contractor

Your are a contractor requiring to cover completely a floor measuring 1000 cm by 440 cm, with identical square tiles with length that is a whole number.

·         What is the side of the largest possible square tile?
·         How many such tiles do you need if you use the largest possible square tiles?