Maths tip: This is a challenging question that involves rates and ratios. It can be solved easily with algebra but there’s also a model method. Give a try, and let me know if there are any other methods! Q: A can paint the room in 9h. B takes 6h to paint a similar room. Given[…]
Science tip: It’s very important to use and spell keywords correctly! Marks cannot be given for a keyword that isn’t used or spelled incorrectly. Example: Q: Explain why a durian higher up in the tree will fall and land with a louder thud than a durian lower down in the tree. Poor ans: The durian[…]
Science tip: Properties of heat conductivity, absorption of radiation as thermal energy, and heat capacity can be confusing. Heat conductivity is the property of a material’s ability to conduct heat. The better the conductivity, the faster heat can transfer from one end to another. The absorption of heat through radiation – sometimes less accurately called[…]
Maths tip: One more example of "common difference". By now, these type of questions shouldn’t be a problem 🙂
Maths tip: Here’s another example of "common difference".
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[…]
Interesting science fact: Not all insect-pollinated flowers smell good. Flowers that attract flies / beetles as pollinators attract these insects with smells of rotting flesh or dung! An example of this is the Rafflesia flower, which can be over 100cm in diameter!
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 🙂
Science tip: Questions relating to the differences between insect- and wind-pollinated flowers seem to be quite common. I will post some of these in the future. In the meantime, refresh your memory with this table! 🙂
Science tip: Gravitational Potential Energy – the more heavy the object and the higher it is above the ground, the larger its gravitational potential energy. Kinetic Energy – the faster the object is moving and the more heavy it is, the greater its kinetic energy. In this particular question – bag C starts off with[…]