Binomial Theorem: Definition, Rules, Practice Questions with Answers; Free PDFs Download

Quantitative Aptitude Prep Tips for MBA 2025

Vipra Shrivastava
Updated on Jun 13, 2025 16:34 IST

By Vipra Shrivastava, Senior Manager - Content

Binomial Theorem is a way of expanding a given equation and simplifying it. We break the given equation in many different fragments based on the power. The useful application for Binomial Theorem is that when the equation's power increases, the calculation work becomes tedious. It is not easy to calculate the value of (x + y4)13 easily as that would take a long time. But by using binomial theorem, we can easily calculate its value. Binomial Thoerem is used in Algebra, Probability and Calculus.

In CAT and other MBA entrance exams, questions on Binomial Theorem appear in Quantitative Aptitude section. The questions are usually of moderate difficulty level. To prepare Binomial Theorem for CAT or any other entrance/competitive exam, one needs to understand the fundamentals. Read here all about Binomial Theorem. 

Table of content
  • What is Binomial Theorem?
  • Parts of Binomial Theorem
  • CAT Quantitative Aptitude Questions for Practice with Solutions
  • FAQs Related to Binomial Theorem
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What is Binomial Theorem?

Binomial theorem can be referred to as the method of expanding an expression that has been raised to any finite power. A binomial theorem has applications in Algebra, probability, etc.

To understand it further, whenever an equation has been raised to high powers, it is difficult to simplify it and get the answers. Hence we simplify the given equation by breaking it into parts of each power, starting from 0. In the binomial theorem, we have two variables that are being expanded. If we use more than two variables in expansion, then the expansion is called multinomial expansion that follows a different technique.

Also Read: MBA Preparation 2025: Tips to Prepare for MBA Entrance Exams

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Parts of Binomial Theorem

Any binomial expansion has different terms as the power of a variable and consonant keeps increasing from 0. Hence binomial expansion sees the use of permutation and combination concepts. Some terminologies used in the binomial expansion are:

  • General term
  • Middle term
  • Independent term
  • Numerically greatest term
  • Ratio of consecutive terms

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What are the Different Types of Arithmetic Operations?

The binomial theorem can be classified based on the power for which it is expanding. Some of the major categories are:

  • Binomial Theorem for Rational Index
  • Binomial Theorem for Negative Index
  • Multinomial Theorem (more than three variables in the equation)
  • Pascal's Triangle 

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FAQs Related to Binomial Theorem

Q: How is the binomial theorem helpful in arithmetic?

A: The binomial theorem is used to simplify the complex expanding operations that involve high finite powers. 

Q: What is multinomial expansion?

A: When the number of variables in the expansion equation is more than 3, we call it a multinomial expansion.

Q: How many middle terms are there in even number power expansions?

A: When the power is any even number that means that the total number of terms would be odd, we can get exactly one middle term for even powers.

Q: What are different types of binomial theorem based on the index?

A: The binomial theorem can be broadly classified into two parts based on the index— the binomial theorem for the rational index and the binomial theorem for the negative index.

Q: Can we find remainder using binomial theorem?

A: We can find the remainders of any given equation by using the binomial theorem. Binomial theorems can also be used to find the digits of any given number when it is powered.
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