More on ‘O’ Level E-Math Circles Revision Workshop (Click here)

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I have previously written 2 posts:

E-Math: Drawing and Understanding of Cumulative Frequency Curve (Step by step working included)

In this post, I have used an examination question to illustrate how to draw a cumulative curve using the information from the cumulative table, how to use the curve to find median weight, how to find percentile.

E-Math: 5 Features of Box and Whisker Plot You Must Know

A summary is given on the essential parts of a Box and Whisker Plot. Do you know there’s a difference between interquartile range and range? Do you know how to read the upper & lower quartile, how to read the media?

Both are under the big topic of Statistics which is the most fun chapter as it relates really closely to what we see everyday.

Have fun!

Photo Credit: fdecomite

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Photo Credit:Viernest

In E-Math, one of the commonly asked questions in Paper 1 usually involved Kinematics (which is closely associated with motion) and in E-Math, we discuss about Distance, Speed and Acceleration.

One of the important definitions all students must know is acceleration. It’s defined simply as the change of velocity with time.

I’m going to use the following example to highlight the types of information we can obtain from a speed-time graph. It contains my handwriting, hope it works well for you ;)

Try out the question before peeping at my solutions. (Highlighted parts = important formula)

speed-time graphs Hide

This is my first attempt this year to produce a video. Should the response be good, I will use video to share more tips and strategies with my audience, so please leave me a comment.

Please pardon me the ‘echo’ effect in my introduction and also the low resolution. I was using my new logitech webcam :D

I’m working towards producing better quality videos. Share tips on this if you have any. Would appreciate it.

For more posts on matrix, please refer to the related posts below.

I look forward in hearing your comments and the answer to the question in the video.

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Photo Credit:purpleslog

In today post,I’m going to talk about some concepts related to everyday life, we call this everyday Math. As you see the image on the side, you know I’m going to talk about money and where is money being ’stored’? Well, safely in the bank! So have you wondered why banks give you interest (peanuts though) for doing you a service of keeping your money safely? Should they charge you?

Today we are going to discuss about interest, compound interest in particular. I would strongly suggest you read these 2 posts before attempting the question first.

1. Simple & Compound Interest
2. Formula Usage on Simple & Compound Interest

These 2 posts discuss the basic concepts on the differences between Simple and Compound Interest as well as what you should note when using the formulas.

I came across the following question while doing an exampaper analysis for my student recently and it so coincides with the topics I want to discuss this week.

Example:

Do the question yourself and check your level of understanding. It should take you 2 minutes.

Spot the error!

Common mistake (click here for image). Did you make this mistake too? Do you know where the error is?

Lesson Learnt

The correct working is shown here. (click)

Test out your understanding

If the original question is modified to compounded half-yearly with the principle amount of $75 000 being deposited at the same rate of 1.8% per annum, calculate the total amount at the end of 1 year. What would be your answer? Leave your answer in the comment section.

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