Civil Service Exam (Subprofessional) Numerical Ability — Word Problems — Speed/Distance/Age, Discount & InterestConcept Map
For visual learners attacking the Civil Service Exam (Subprofessional) 2026, a Word Problems — Speed/Distance/Age, Discount & Interest concept map is usually worth more than ten pages of linear notes. CSC builds many Word Problems — Speed/Distance/Age, Discount & Interest items around the same handful of relationships — spot them on a map and you recognise them at a glance in the Numerical Ability paper.
Exam context
On the Civil Service Exam (Subprofessional) 2026, the Numerical Ability subtest carries a "~25% weightage" weight in Civil Service Commission (CSC)'s pattern. Word Problems — Speed/Distance/Age, Discount & Interest lands at position 6th out of 9 in the standard review order. Target score is 80%, and roughly 17 items come from Numerical Ability on a typical Civil Service Exam (Subprofessional) paper.
Word Problems — Speed/Distance/Age, Discount & Interest - Concept map
Central Concept
Word Problems in Numerical Ability
Related Concepts
Concept
Speed Distance Time Problems
Sub Concepts
- Basic formulas (Speed = Distance/Time)
- Unit conversions (km/hr to m/s)
- Average speed calculations
- Round trip problems
- Meeting and overtaking scenarios
Relationship To Central
Core application area requiring formula manipulation and unit conversion
Concept
Age Problems
Sub Concepts
- Present age calculations
- Past age relationships
- Future age scenarios
- Age ratio problems
- Multiple person age problems
Relationship To Central
Mathematical reasoning using present, past, and future relationships
Concept
Discount Problems
Sub Concepts
- List price and selling price
- Discount percentage calculation
- Trade discount
- Quantity discount
- Promotional discount
Relationship To Central
Business mathematics involving percentage calculations
Concept
Interest Problems
Sub Concepts
- Simple interest formula (I = PRT)
- Principal, rate, time calculations
- Compound interest formula
- Maturity value calculations
- Present value problems
Relationship To Central
Financial mathematics with simple and compound interest
Concept Connections
To
Unit Conversion
From
Speed Distance Time Problems
Strength
strong
Relationship
requires conversion between different measurement systems
To
Algebraic Equations
From
Age Problems
Strength
strong
Relationship
uses variable assignment and equation solving
To
Percentage Calculations
From
Discount Problems
Strength
strong
Relationship
fundamentally based on percentage operations
To
Compound Interest
From
Simple Interest
Strength
strong
Relationship
compound interest builds upon simple interest concepts
To
Discount Problems
From
Business Mathematics
Strength
strong
Relationship
discount is a key component of business calculations
To
Interest Problems
From
Principal Rate Time
Strength
strong
Relationship
core variables in all interest calculations
To
Speed Distance Time Problems
From
Average Speed
Strength
moderate
Relationship
special case requiring total distance and total time
To
Age Problems
From
Age Ratios
Strength
moderate
Relationship
specific type of age problem involving proportional relationships
To
Simple Interest
From
Maturity Value
Strength
moderate
Relationship
final amount after adding interest to principal
To
Compound Interest
From
Present Value
Strength
moderate
Relationship
inverse calculation to find initial investment amount
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