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Browse all frequently asked questions below. Click on any question to view the detailed answer.

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What iSchool concepts are covered under the Algebra topic?

The topical concepts covered under Algebra include:
  • Algebra in One Variable
  • Simplifying Algebraic Expressions
  • Boxing
  • Algebra Substitution
  • Algebraic Fractions
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What iSchool concepts are covered under the Rate topic?

The topical concepts covered under Rate and Speed include:
  • Tiered Rate
  • Rate for One Object
  • Rate for More Than One Object
  • Filling a Tank
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What iSchool concepts are covered under the Data Analysis topic?

The topical concepts covered under Data Analysis include:
  • Picture Graph
  • Bar Graph
  • Table
  • Line Graph
  • Pie Chart
  • Right Angle
  • Average
  • Averaging Out
  • Two Averages
  • Min-Max Change
  • Average Change
  • Average with Repeated Identity
  • Average with an Unknown Quantity
  • Average with Min-Max
  • Cumulative
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What iSchool concepts are covered under the Volume topic?

The topical concepts covered under Volume include:
  • Volume
  • Volume of a Cuboid
  • Volume of a Cube
  • Cube View
  • Square and Square Root
  • Cube and Cube Root
  • Base Area
  • Base Area × Height
  • Surface Area
  • Partly Painted Surface Area
  • Height of a Cuboid
  • Filling Up with Cubes
  • Filling a Tank
  • Displacement
  • Volume Transfer
  • Volumes with a Common Base Area
  • Volumes with a Common Height
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What iSchool concepts are covered under the Area and Perimeter topic?

The topical concepts covered under Area and Perimeter include:
  • Length
  • Labelling
  • Formula
  • Rectangle
  • Square
  • Rectilinear Figure
  • Square and Square Root
  • Factors
  • Triangle
  • Equilateral Triangle
  • Isosceles Triangle
  • Right-Angled Triangle
  • Tiling
  • Folded Figure
  • Triangles with a Common Base
  • Triangles with a Common Height
  • Parallelogram
  • Rhombus
  • Trapezium
  • Circle
  • Circumference
  • Area of a Circle
  • Semicircle
  • Quarter Circle
  • Composite Figure Perimeter
  • Composite Figure Area
  • Filling Up with 2D Shapes
  • Cut and Paste
  • Leaf
  • Boomerang
  • Overlapping Area
  • Similar Figures
  • Surface Area with Unit Cubes
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What iSchool concepts are covered under the Measurement topic?

The topical concepts covered under Measurement include:
  • Scale Reading
  • Length
  • Mass
  • Money
  • Area and Perimeter
  • Volume
  • Estimation
  • Min-Max Change
  • Unit Conversion
  • Time
  • a.m. and p.m.
  • 24-Hour Clock
  • Duration
  • Timeline
  • Start and End Time
  • Time Zone
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What iSchool concepts are covered under the Angles topic?

The topical concepts covered under Angles include:
  • Right Angle
  • Estimation of an Angle
  • Protractor
  • Ruler and Set Square
  • Rectangle
  • Square
  • Triangle
  • Equilateral Triangle
  • Isosceles Triangle
  • Right-Angled Triangle
  • Circle
  • Parallelogram
  • Rhombus
  • Trapezium
  • Angles on a Straight Line
  • Vertically Opposite Angles
  • Angle Sum of a Triangle
  • Angles at a Point
  • Construction
  • Exterior Angle of a Triangle
  • Alternate Angles
  • Corresponding Angles
  • Interior Angles
  • Overlapping Angles
  • Sum of Angles in a Quadrilateral
  • Angle Properties within a Circle
  • Sum of Angles in a Star
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What iSchool concepts are covered under the Geometry topic?

The topical concepts covered under Geometry include:
  • Straight or Curved
  • Rectangle
  • Square
  • Triangle
  • Grid Squares
  • Grid Dots
  • Perpendicular and Parallel Lines
  • Symmetry
  • Equilateral Triangle
  • Isosceles Triangle
  • Right-Angled Triangle
  • Parallelogram
  • Rhombus
  • Trapezium
  • Nets
  • Cube
  • Cuboid
  • Prism
  • Pyramid
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What iSchool concepts are covered under the Patterns topic?

The topical concepts covered under Patterns include:
  • Odd and Even
  • Sets
  • Division with Remainder
  • Equal Intervals
  • Repeated Patterns
  • Square Numbers
  • Cube Numbers
  • Rainbow Method
  • Sum of Consecutive Numbers
  • Sum of Consecutive Odd Numbers
  • Sum of Consecutive Even Numbers
  • Multiples of the Sum of Consecutive Numbers
  • Product of Consecutive Numbers
  • Guess and Check
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What iSchool concepts are covered under the RFPD topic?

RFPD combines related concepts involving:
  • Ratio
  • Fractions
  • Percentage
  • Decimals
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What iSchool concepts are covered under the Ratio topic?

The topical concepts covered under Ratio include:
  • Finding Ratio
  • Ratio in Simplest Form
  • Equivalent Ratios
  • Fraction to Ratio
  • Decimal to Ratio
  • Ratio to Fraction
  • Ratio to Units
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What iSchool concepts are covered under the Percentage topic?

The topical concepts covered under Percentage include:
  • Finding Percentage
  • Percentage of a Whole
  • Percentage of a Set
  • Percentage Change To
  • Percentage Change By
  • Percentage to Fraction
  • Fraction to Percentage
  • Percentage to Decimal
  • Decimal to Percentage
  • Percentage to Ratio
  • Ratio to Percentage
  • Percentage to Units
  • Percentage Change
  • Discount
  • GST
  • Interest
  • Profit and Loss
  • Percentage of Different Bases
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What iSchool concepts are covered under the Decimals topic?

The topical concepts covered under Decimals include:
  • Decimals Place Values
  • Decimals Addition and Subtraction
  • Decimals Number Line
  • Decimals Multiplication
  • Decimals Division
  • Decimals: Four Operations
  • Decimals Remainder
  • MRDL
  • Decimals Order of Operations
  • Decimals Round Off
  • Fraction to Decimal
  • Decimal to Fraction
  • Decimal to Units
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What iSchool concepts are covered under the Fractions topic?

The topical concepts covered under Fractions include:
  • Fraction of a Whole
  • Fraction of a Set
  • Equivalent Fractions
  • Fractions in Simplest Form
  • Fractions Addition and Subtraction
  • Comparing Fraction Values
  • Fractions Number Line
  • Common Denominator
  • Fractions with Units
  • Improper Fractions
  • Mixed Numbers
  • Fractions Multiplication
  • Fractions Division
  • Fractions: Four Operations
  • Fractions Order of Operations
  • Fraction to Units
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What iSchool concepts are covered under the Whole Numbers topic?

The topical concepts covered under Whole Numbers include:
  • Numbers in Words
  • Odd and Even
  • Whole Numbers Addition and Subtraction
  • Whole Numbers Multiplication and Division
  • MRDL
  • Whole Numbers: Four Operations
  • Whole Numbers Number Line
  • Whole Numbers Place Values
  • Multiples
  • Factors
  • Whole Numbers Round Off
  • Divisor and Quotient
  • Whole Numbers Remainder
  • Whole Numbers Order of Operations
  • Distributive Law of Multiplication
  • Common Factors
  • Highest Common Factor
  • Common Multiples
  • Lowest Common Multiple
  • Multiples with Remainder
  • Remainder Min-Max
  • Min-Max
  • Rows and Columns
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What is the RFPD Topic?

RFPD stands for Ratio, Fractions, Percentage and Decimals. It is an iSchool topic that groups these closely related concepts together, helping students understand how they are connected and apply them more effectively when solving PSLE Math questions.
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What is the Strategies Topic?

The Strategies topic helps students develop systematic approaches to solving multi-step PSLE Math problem sums. Instead of focusing on a specific mathematical topic, it teaches students how to recognise question patterns, identify the relationships between quantities, recognise the underlying problem-solving concepts, choose the most appropriate solving technique, and determine the value of one unit before completing the solution.
Examples include:
  • Units Method
  • Fraction to Units
  • Units Manipulation
  • Other commonly used problem-solving strategies.

Students can practise unlimited variations of each strategy using Generate New, helping them recognise when and how to apply each method confidently across different problem sums.
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What is the Mental Sums Topic?

The Mental Sums topic helps students develop the speed, accuracy and number sense needed to solve calculations mentally without relying on written working. It strengthens recall of basic facts and encourages students to recognise number patterns and use efficient mental strategies to solve questions quickly.
Examples include:
  • Addition and subtraction
  • Multiplication and division
  • Fractions, decimals and percentages
  • Number patterns
  • Estimation and quick calculations

Students can practise unlimited variations of Mental Sums questions using Generate New, helping them improve calculation speed, accuracy and confidence for both school exams and the PSLE.
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Are the questions suitable for different ability levels?

Yes. Most Topics include questions across three difficulty levels, allowing students to learn at a pace that matches their current ability and gradually progress to more challenging questions.
Students should begin at a level suited to their current ability and progress only after they can solve the questions accurately and independently.
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What do Level 1, Level 2 and Level 3 mean?

Questions are arranged into three difficulty levels to help students progress systematically.
  • Level 1 (Basic) – Builds a strong foundation through straightforward question types that reinforce fundamental concepts.
  • Level 2 (Intermediate) – Develops deeper understanding by applying concepts to more challenging and multi-step question types.
  • Level 3 (Advanced) – Challenges students with complex PSLE-style questions that require deeper reasoning and advanced problem-solving skills.

Students should begin at a level that matches their current ability and progress only after they can solve the questions accurately and confidently on their own.

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