Maths tip: Another type of problem sums involve before-after scenarios, where the difference between two quantities remain unchanged. An example is shown in the picture. Recognising the question is half the battle won. Typically the question tells you a ratio of the "before" scenario. After an equal amount is removed / added / after a[…]
Maths tip: Some maths questions asks to find, say, the sum of two angles or the difference in two areas. Sometimes it’s not possible to find each individual angle / area. So keep an open mind 🙂
Maths tip: I came across this interesting question. So interesting that I had to find different ways to solve it. 🙂 Have a go, let me know if you’ve discovered other ways! "Mr Lim left Town A for Town Bwhile Mr Tan left Town B for Town A. Both men left at the same time.[…]
Maths tip: "Double-if" type questions appear frequently. Here’s another example, solved with three methods. Students are free to pick the method they prefer! Maths tip: Here are three double-if questions to try. Can be solved with the three methods I posted earlier. Let me know if you need any help! Jack and Aqil had some[…]
Maths tip: Scenario type questions, sometimes also called "Double-if" questions, are common in the last section of the Maths paper. An example is "Andy and Bob each had a certain amount of money. If Bob gave Andy $40, Andy would have twice as much as Bob. If Andy gave Bob $40, Bob will have thrice[…]
Maths tip: Read the question carefully. In this question, 50% of water left in the tank is not 50ml but rather 60ml.
Maths tip: Some rate questions asks for combined rate. For these, first determine the rate, and then add them together. Example: "Lionel would take 8 days to build a wall. For the same wall, Nick would take 6 days. How many days would be needed to build the same wall if both of them worked[…]
Maths tip: Here’s another step by step model drawing example. Question: Betty Siti and Meiling had $5000 altogether. Betty spent 2/5 of her money and Siti spent $500. The ratio of the amount of money Meiling spent to the amount of money Betty spent was 3:4. In the end, they had the same amount of[…]
Maths tip: Another area question that seems to be quite popular. 2 solution methods are presented 🙂
Maths tip: Area problems can be challenging. One way to tackle these is to familiarise yourself with some of the problems and get an idea of how to solve them. Here’s one example. Try it!