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I received this from a student of mine who was really confused with the transition from line 2 to line 3. Students should give it a thought before reading my explanation below. Firstly, my [...]

A few weeks back, I conducted a weekend of lessons on the modulus sign (or absolute value sign) with all my JC2. Its to prepare them for the upcoming prelims and A-levels. Many students till [...]

Many of my students seem to be impressed with my method of doing partial fractions, and after I explain to them, I think they all can conclude that it is nothing more than kindergarten math [...]

The average of 999 numbers is 999. From these numbers, I chose 729 of them and their average is 729. Find the average of the remaining numbers? Hint: Try to use algebra. Ans = 1728 Arithmetic [...]

The sign definitely can cause a lot of confusion for students. For starters, and the list goes on. So my focus today is to explain when to put while dealing with . First, lets recognise a few [...]

This is a classical mathematical fallacies. At hindsight, everything looks perfectly fine. This is a rather difficult one as the error is actually hidden in the second last line! The mistake here [...]

This is a fairly simple and interesting question that test students on their algebra and arithmetic manipulation. Use of Calculator is NOT required. Ans: 4 Arithmetic Problem #7 Arithmetic [...]

I saw this problem on Facebook recently and thought its really quite interesting. Given , find . Ans: 0 Hint: Consider substituting some numbers in.

This is a classical mathematical fallacies. At hindsight, everything looks perfectly fine. So did you manage to spot the error? It is at line 5, where we divide both sides of the equation by . [...]

Here is some sharing over a very fascinating constant . We know this is (up to 3 sig. fig. accuracy) or even (up to 7 sig. fig. accuracy). One of my favourite way of deriving this never-ending [...]