Commonly asked in school and ‘O’ Level Examinations, many students also commit to commonly made mistakes. Watch the video (5 minutes) and see how you can add another 3 marks easily.

Leave me your comment. I would love to hear from you.

Click here for a direct link to the video

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How to tell if 2 vectors are //?

It’s easy if you’re given a diagram. What if a diagram isn’t provided? Then we need to look at relationship between the vectors.

As long as 2 vectors are expressed as scalar multiple of each other, the 2 vectors are //. What exactly do I mean? Look at the following example equations, they are examples of vectors // to each other.

This also means if you’re able to establish such relationship between 2 vectors, you can prove that the vectors are // to each other.

Very often, question will ask you to explain why A, B and C lie on a straight line. (Look at Example 3)

The term to describe 3 points on the line is known as Collinear.

3 Points to show Collinear

1. Establish a relationship between the 2 vectors
2. Conclude that the 2 vectors are // to each other
3. Common point is present

We can even draw a diagram to represent the two vectors. Since the relationship between the 2 vectors has a negative sign, it means that vectors AB and AC are in opposite direction. Vector AC is also twice of vector AB.

Do you have other ways to prove 3 points are collinear? I would love to hear from you.

Do you know that if you are asked to prove 2 vectors are //? A similar approach can also be used.

Follow me on twitter if you like to have more ‘O’ Level Math Tips.

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Most students should have completed your common tests or in the midst of completion.

How have you performed? Are you happy with your results? Are you upset? Or you don’t bother at all?

What matters most is perhaps not what you have scored, but moving forward, what do you do with the outcome?

Every test or examination has a lesson for us to learn. Do you sit down and think through the lessons taught or you simply forget about it?

3 Questions to learn the lesson well:

1. Ask yourself, what are some of the good things you have done? (You start preparation early, you clarify all your questions before the test, you did your assignments consistently, you manage your time well, you handle the questions with calm and confidence)
2. What did not go right this time? (Slept too late the night before your test, you didn’t put in any effort, your ‘what’s-the-great-deal’ attitude, you didn’t finish the questions due to poor time planning)
3. What is one action you would work on to improve upon on your next test or examination?

Regardless how you have fared for your test, there are definitely good things you have done, it just takes time to realize and acknowledge.

So, what you have learnt?

Photo Credit: KaCey97007

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I was looking at this year ‘O’ level examinations timetable and observed the following:

Unlike last year where first official week is reserved for English, E-Math & A-Math, we see a ’scary’ schedule in which A-Math Paper 2 is combined with Pure Chemistry Paper 2 or Combine Sci Paper 3 on the same day. (29 Oct 2010)

E-Math Papers are scheduled separately on consecutive days afternoons. This arrangement is just like 2009 timetable. Candidates need to keep themselves in peak performance despite the 230pm paper.

Download the entire 2010 GCE ‘O’ Level Examinations Timetable here.

For more details, please visit Singapore Examinations Assessment Board. (http://www.seab.gov.sg)

O Level Exams Timetable Hide

I gave my Secondary 4 students 1 revision question per week. The recent one I marked was on the topic of Logarithms (the fresh-killer topic for many Secondary 3).

Did you spot the error? (It’s a give-away if you observe clearly)

Do this question and share your answer(s) in the comment section.

I look forward in hearing from you.

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