Approximation questions for SBI Clerk are one of the highest-scoring topics in the Quantitative Aptitude section, typically appearing as a set of 5–10 questions. Instead of finding the exact value, candidates round numbers and use quick mental calculations to identify the closest answer option. 

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Download Approximation Questions for SBI Clerk Sets

The sets below are available for free download and are designed to help you prepare effectively for the SBI Clerk exam. Each set includes many practice questions with detailed solutions, allowing you to strengthen your concepts and improve both speed and accuracy. Complete one set daily, then take the corresponding Guidely quiz to assess your performance and track your progress under exam-like conditions. 

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Core Concept in Approximation: 

The Rounding Rules

Look at the digit immediately after the decimal point to decide how to round:

• Rule 1 (.5 or higher): If the decimal part is .5, .6, .7, .8, or .9, round up to the next whole number.

• Example: 14.92 becomes 15

• Example: 89.51 becomes 90

• Rule 2 (less than .5): If the decimal part is .1, .2, .3, or .4, round down by dropping the decimal.

• Example: 21.23 becomes 21

• Example: 7.09 becomes 7

The Golden Rule: BODMAS

After rounding off the numbers, you must solve the equation using the strict BODMAS order of operations.

Quick Example

• Question: (11.98)² + 4.02 × 49.91 =?

• Step 1 (Round off): 12² + 4 × 50 =?

• Step 2 (Apply BODMAS): 144 + 200 = 344

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Important Strategies to Solve Approximation Questions in SBI Clerk Exam

To ace the Approximation section in the SBI Clerk exam, you need a mix of rapid rounding rules, mental math shortcuts, and strict calculation order.

Below are some of the most effective strategies to solve these questions in under 30 seconds. 

1. Master the Visual Rounding Rules

Never calculate with decimals. Immediately convert them to the nearest whole number or friendly fraction:

• The 0.5 Threshold: Round up if the decimal is ≥ 0.5 (e.g., 15.89 → 16). Round down if it is < 0.5 (e.g., 42.12 → 42).

• Look for Percent Fractions: If you see 24.99%, treat it as 25% or 1/4. If you see 33.33%, instantly change it to 1/3.

• Pairing Numbers: Round one number up and the other down if they are multiplied. For example, 24.2 × 15.8 approximates better as 24 × 16. 

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2. Commit Core Math Facts to Memory

You cannot afford to calculate squares or roots manually during the exam. Memorise these values to identify them instantly: 

• Squares: Memorise squares from 1 to 30 (e.g., 24² = 576).

• Cubes: Memorise cubes from 1 to 15 (e.g., 11³ = 1331).

• Fraction-to-Percentage Table: Know values up to 1/20 (e.g., 1/8 = 12.5%, 1/6 = 16.66%). 

3. Rely on Perfect Square Anchors

When given a complex square root, look for the closest known perfect square:

• If the question has √1020, mentally link it to √1024 = 32.

• If you see √730, instantly round it to √729 = 27.

4. Use Unit Digit Elimination Cautiously

In exact Simplification questions, unit digits save time. In Approximation, the final answer is an estimate, so do not rely on the last digit. Instead: 

• Look at the option choices first.

• If the options are far apart (e.g., 210, 290, 380, 450), you can round aggressively.

• If the options are very close (e.g., 242, 245, 248), do your final calculations carefully.

5. Always Execute BODMAS Order

The exam triggers traps for students who calculate from left to right. Force your brain to follow this sequence:

1. Complete items inside Brackets first.

2. Convert and solve "Of" statements (treated as multiplication).

3. Execute Division and Multiplication from left to right.

4. Execute Addition and Subtraction last.

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FAQs

Q. How many Approximation questions are asked in the SBI Clerk exam?

The SBI Clerk Prelims exam typically includes 5 to 10 Approximation questions in the Quantitative Aptitude section.

Q. Are Approximation questions important for SBI Clerk preparation?

Yes. Approximation is one of the highest-scoring topics in the SBI Clerk exam.

Q. Is this practice material suitable for beginners?

Yes. These practice sets are designed for both beginners and experienced aspirants.

Q. Do these question sets include detailed solutions?

Yes. Every practice set includes detailed, step-by-step solutions to help you understand the reasoning behind each answer and improve your problem-solving skills.