From a paper to a better attempt.
Everything on the site connects. Here is how the pieces fit together.
How it all connects
Each level breaks down into the next.
- 1
Paper
A full exam paper, like CDS 2020 (II).
- 2
Question
One of the 100 questions in a paper.
- 3
Skill
The idea a question tests, such as LCM and HCF.
- 4
Topic
A group of skills, such as Arithmetic.
So a question uses skills, and skills belong to topics. Learn a skill once and it helps in every paper.
What is a skill?
A small piece of knowledge a question needs. Each skill page gives the formula, how to use it, a worked example and where it appeared in past papers.
- Technique
- Identity
- Procedure
- Theorem
- Formula
- Definition
What is a topic?
The big area a skill belongs to. CDS Maths has 209 skills across 6 topics, so you can study one area at a time.
- Arithmetic
- Algebra
- Geometry
- Trigonometry
- Mensuration
- Statistics
Reading a solution
Open any question and tap to see its solution. Each part has its own section.
Answer
The correct option, up front.
Step by step
The working, one line at a time.
Shortcut
A faster route when one exists.
Common mistakes
Where most people slip.
Skills used
Tap through to learn them.
What a paper page tells you
- Questions, time and marks
- Marking scheme, including negative marks
- Topic spread across the paper
- Difficulty spread across the paper
How hard is a question?
Difficulty is how likely a prepared candidate is to get the question right in the time the exam allows.
- Very easy
- Easy
- Moderate
- Hard
- Very hard
How attempting works
Same paper, same clock, same marking as the real exam.
- 1
Pick a paper
A past paper or a generated mock.
- 2
Attempt it
Timed, with the real marking scheme.
- 3
Submit
We log your time on every question.
- 4
Read your insights
See what to change next time.
What you get after an attempt
The score you could have had.
Our headline number: your score with better question selection.
Time per question
See where minutes were wasted.
Easy ones missed
Marks you should have had.
Hard ones that ate the clock
Questions worth leaving for later.
Weak topics and sections
Where you lose the most.
Skills to learn
Exact skills that close each gap.
Ready to try a paper?
Start with CDS Elementary Mathematics.