CSAT Formula Book for UPSC Prelims 2025
CSAT Formula book compiles formulas and tricks for easy revision before the exam. Go through the CSAT Formula Book PDF, a useful cheat sheet that will help in Prelims 2025.
Deeksha Dixit25 May, 2025
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CSAT Formula: The UPSC Civil Services Aptitude Test (CSAT) requires candidates to demonstrate proficiency in comprehension, logical reasoning, basic numeracy, and data interpretation. Candidates struggle with the CSAT syllabus because it can be overwhelming to revise all topics at the last minute. In such a scenario, the CSAT Formula PDF can be highly beneficial by offering quick tricks and revision before the exam.
The CSAT formula book has a collection of ready-to-use quick formulas and tricks that may come in handy in the last-minute revision and earn a few extra marks. Explore some important formulas in the PW OnlyIAS CSAT formula book to revise before the exam with ease.UPSC CSAT Formula Book
To prepare for the CSAT paper or GS Paper II, candidates should ensure that they have covered all the topics mentioned in the syllabus. The UPSC CSAT exam syllabus has been mentioned in the notification and covers the following subjects:- Comprehension
- Interpersonal skills, including communication skills
- Logical reasoning and analytical ability
- Decision-making and problem-solving
- General mental ability
- Class X level Basic numeracy (numbers and their relations, orders of magnitude, etc.)
- Data interpretation (charts, graphs, tables, data sufficiency, etc. — Class X level)
Also Read: UPSC CSAT Books, Books For IAS Prelims CSAT Paper
UPSC CSAT Formula Book PDF Download
CSAT Formula PDF can be a valuable resource for UPSC aspirants preparing for this paper. UPSC CSAT Formula books compile essential formulas, concepts, and tricks crucial for success in the exam in a structured and organized format. PW offers a comprehensive and crisp CSAT Formula PDF that contains a collection of important formulas and tricks that can be useful for last-minute revision.| CSAT Formula Book | |
| Book Title | Download Link |
| PW OnlyIAS CSAT Formula Book | Click Here |
Important CSAT Formulas
Having a strong command over the CSAT Formula enables candidates to solve problems more efficiently during the exam, saving valuable time and ensuring accuracy. These formulas cover various topics such as algebra, geometry, ratio, and data interpretation, among others. Here are important CSAT formulas for basic numeracy and reasoning sections:Arithmetic Progression
Arithmetic Progression (AP) is a sequence of numbers in which the difference between consecutive terms is constant. This constant difference is called the "common difference." The formula for Arithmetic Progression in CSAT is:
Where a = First term, d = Common difference, Tn = nth term, Sn = Sum of n terms
Algebraic Formulas
Algebraic formulas encompass a wide range of equations and expressions used to solve problems involving variables and constants. Some of the algebraic formulas useful in the CSAT exam include:- (a+b)² = a² + b²+ 2ab
- (a-b)² = a²+ b²– 2ab
- a² + b² = (a-b)² +2ab.
- a² – b² = (a-b)(a+b)
- a³+b³ = (a+b) (a² – ab + b²)
- a³-b³ = (a-b) (a² + ab + b²)
- (a+b+c)² = a²+b²+c²+2ab+2ac+2bc.
- (a-b-c)² = a²+b²+c²-2ab-2ac+2bc.
Profit & Loss
In mathematics, the concept of Profit and loss is generally used from an economic perspective. Profits occur when a good is sold higher than its actual cost, whereas a loss is caused if it is sold lower than the cost price. To find out whether there is profit or loss, the difference between the cost price and the selling price is considered:- Profit = Selling Price – Cost Price
- Loss = Cost Price – Selling Price
- Profit % = Profit / Cost Price x 100
- Loss % = Loss / Cost Price x 100
- Discount = Marked Price – Selling Price
- Discount % = Discount / Marked Price x 100
Average
The average, also known as the arithmetic mean, is a central measure of a set of numbers. It is calculated by summing all values and dividing by the total number of values. In UPSC CSAT, the average is one of the most important topics that is repeated almost every year. Here is the formula for calculating the average:Percentage
Percentages represent a portion of a whole number expressed in terms of 100. In CSAT percentage formula is commonly used to compare proportions and solve quantitative aptitude problems. It also has relevance in the other topics of the syllabus, such as the Data interpretation section. Here is how to calculate the ‘Percentage’ in the CSAT exam:Divisibility Rule
Divisibility rules are simple shortcuts or tricks that help us quickly determine whether a number can be divided evenly by another number without actually doing the division.
- Divisible by 1: Every number is divisible by 1.
- Divisible by 2: A number is divisible by 2 if its last digit is even (0, 2, 4, 6, 8).
- Divisible by 3: A number is divisible by 3 if the sum of its digits is divisible by 3.
- Divisible by 4: A number is divisible by 4 if the last two digits form a number that is divisible by 4.
How to Revise the CSAT Formula for Exam?
- Review fundamental topics in mathematics, logical reasoning, and language comprehension.
- Take note of frequently asked questions and focus revision around them.
- Summarize all important formulas on a single sheet or flashcards.
- Create memory aids or visual tricks to remember complex formulas. For example, use acronyms.
- Revise formulas by solving 5–10 problems daily from each major topic.
Get ready for the UPSC Prelims 2025 exam. Explore PW UPSC Courses!
CSAT Formula FAQs
How many maths questions are there in CSAT?
Around 20 to 25 maths questions are there in CSAT.
What is basic numeracy in UPSC CSAT?
Basic numeracy in UPSC CSAT refers to the fundamental mathematical concepts at the Class X level.
What is the scoring pattern of the CSAT paper?
The CSAT paper comprises 80 questions, each carrying 2.5 marks. There is a negative marking of 0.83 marks for each wrong answer.
What is the formula of probability for CSAT in UPSC?
The formula for probability in CSAT is: Probability = Number of favorable outcomes / Total number of outcomes.
What is the formula for time and work in UPSC CSAT?
The formula for time and work involves calculating the work done by an individual or group over a certain period of time, expressed as Work = Rate of work × time.
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