Ratio and Proportion is one of the most important and scoring topics in the Quantitative Aptitude section of the IDBI JAM Grade O Exam. Questions from this topic are usually straightforward and require a clear understanding of basic concepts rather than lengthy calculations. With proper practice, candidates can solve these questions quickly and accurately, making it a high-return topic in the exam.
In this blog, we will cover the importance of ratio and proportion, important concepts, types of questions asked, and preparation strategy along with practice questions.
Download Ratio and Proportion Questions for IDBI Grade O Exam 2026
In this section, we are providing Ratio and Proportion Questions. Our experts curate these after analysing previous years’ patterns. Download Now and practice as many questions as you can.
Key Concepts to Prepare
Before solving questions, candidates must have a strong grip on the following concepts:
- Simplification of ratios
- Equivalent ratios
- Comparison of ratios
- Direct and inverse proportion
- Partnership-based problems
- Mixture and allegation
- Age-based problems
Understanding these concepts will help in solving both direct and application-based questions efficiently.
Types of Questions Asked
1. Basic Ratio Problems
These are direct questions where you need to find unknown values using given ratios.
Example:
The ratio of two numbers is 3 : 5 and their sum is 64.
Numbers = 24 and 40
2. Distribution-Based Questions
A quantity is divided among different people in a given ratio.
Example:
Divide ₹840 in the ratio 2 : 3 : 5
Answer: ₹168, ₹252, ₹420
3. Age-Based Problems
These involve present and future ratios of ages.
Example:
Ratio of ages of A and B is 4 : 5. After 6 years, it becomes 5 : 6.
A = 24 years, B = 30 years
4. Income and Expenditure Problems
Questions based on savings using ratio concepts are common.
Example:
Income ratio = 4 : 3, Expenditure ratio = 3 : 2, Savings same
A’s income = ₹24,000
5. Mixture and Allegation
These questions involve combining two or more quantities in a ratio.
Example:
Milk and water ratio changes after adding water.
Concept of proportion is applied to find initial quantity.
6. Time and Work (Proportion Based)
These questions are based on inverse proportion.
Example:
If 12 men complete work in 15 days, 18 men will complete it in 10 days.
Preparation Strategy for Ratio and Proportion
Build Strong Basics
Start by understanding how ratios work. Learn how to convert ratios into fractions and vice versa. This will help in solving questions faster.
Use the Value Method
Assume variables wherever required. For example, instead of working with fractions, take common multiples to simplify calculations.
Practice Different Variations
Do not limit your preparation to basic questions. Practice application-based problems like mixtures, partnership, and age problems.
Focus on Speed and Accuracy
Since these questions are less time-consuming, aim to solve each question within 30–40 seconds. This will help you save time for more difficult sections.
Revise Regularly
Make short notes of formulas and concepts. Regular revision will ensure you do not forget important methods during the exam.
Practice Questions
Question 1
The ratio of two numbers is 3 : 5. If their sum is 64, find the numbers.
Answer: 24 and 40
Question 2
Divide ₹900 in the ratio 2 : 4 : 3.
Answer: ₹200, ₹400, ₹300
Question 3
The ratio of A’s and B’s ages is 5 : 6. After 5 years, it becomes 6 : 7. Find present ages.
Answer: 25 years and 30 years
Question 4
Income ratio of A and B is 3 : 2 and their savings are equal. Find expenditure ratio.
Answer: 2 : 1
Question 5
If 15 men can complete a work in 12 days, how many men are needed to complete it in 9 days?
Answer: 20 men
Common Mistakes to Avoid
Many candidates make avoidable errors in this topic. Some of the common mistakes include:
- Not simplifying ratios properly
- Ignoring the concept of proportionality
- Making calculation errors in basic arithmetic
- Misinterpreting the question
Avoiding these mistakes can significantly improve your score.
Final Thoughts
Ratio and Proportion is a foundation topic that not only helps in solving direct questions but also strengthens your performance in other areas of Quantitative Aptitude. With consistent practice and a clear understanding of concepts, you can easily score full marks in this topic.
Make sure to include this topic in your daily practice routine and attempt mock tests regularly to track your progress. Mastering Ratio and Proportion can give you a strong advantage in the IDBI JAM Grade O Exam 2026.
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