PSLE Subjects Tips
Selected materials to help your child with
PSLE Preparation and Revision
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P6 Science Prelims (MGS/2023/Booklet B/Q37): Systems: Electricity
Try this common question on electrical circuits and test if you can tell the difference between Parallel and Series circuits. This walkthrough helps solidify your understanding and apply your concepts to solve an actual Prelim Science question.

P6 Science Prelims (Rosyth/2023/Booklet B/Q38): Forms and Sources of Energy
Learn how to understand and infer answers from the question given. This popular question tests energy conversion.
Let’s understand how energy gets converted from one type to the other as we answer this question together.

P6 Science Prelims (NYPS/2023/Booklet B/Q39): Energy (Light)
Let’s go through this fun and interesting question on light! Shooting bullets can be fun, but when we track the shots fired using light alone, how does it work, and is it accurate enough? Let’s find out!

P5 Math Problem Sum: Percentage of Quantity of 2 Items that Changed (Before-After)
Learn the shortcut! By turning the percentage into ratio and using the ratio technique to solve, you now have 1 less thing to learn and it's much easier!
An Example Problem:
In a class, 60% of the students are girls while the rest are boys. After 15 boys left the class, only 10% of the students are boys. What is the total number of students in the class at first?

P5 Math Problem Sum: Fraction of Quantity of 2 Items that Changed (Before-After)
Learn the shortcut! By turning the fractions into ratio and using the ratio technique to solve, you now have 1 less thing to learn and it's much easier!
An Example Problem:
In a class, there are 2/3 as many boys as there are girls. After 15 boys left the class, the number of boys is only 1/9 that of the girls. What is the total number of students in the class at first

P5 Math Problem Sum: Ratio of Quantity of 2 Items that Changed (Before-After)
Learn the easy step-by-step algorithm to solve problem sums that involve a ratio that is changed with an action, a common question in the PSLE and school exams.
An Example Problem:
In a class, the ratio of the number of girls to the number of boys is 3 : 2. After 15 boys left the class, the ratio of the number of girls to the number of boys became 9 : 1. What is the total number of students in the class at first?

P5 Math Problem Sum: Finding Value from Ratio of Quantities
Learn the easy step-by-step algorithm to solve problem sums where you are to find the value when provided information on the ratio of the quantity of 2 (or more) items.
An Example Problem:
Jason has some coins worth a total of $37.20. Given that the ratio of the number of 50-cent coins to the number of 20-cent coins is 5 : 3, find the total value of his 50-cent coins.

P5 Math Problem Sum: Ratio with Common Item
Solving problem sums involving multiple ratios for different items but has 1 common item.
An example problem would look like:
Alicia and Betty had a number of sweets in the ratio of 2 : 5. Alicia and Chloe had a number of sweets in the ratio of 3 : 1. If they had a total of 184 sweets, how many sweets did Chloe have?