IBM Written Test Syllabus: Quantitative and Verbal Ability

IBM’s written test has three sections: Quantitative Aptitude (18 questions in 40 minutes), Number Series (18 questions in 40 minutes), and Verbal Ability (22 questions in 20 minutes).

All three sections run on separate timers. The Quantitative and Number Series sections carry per-question time limits. When the timer for a question expires, the platform moves to the next question automatically. Verbal Ability follows the same format with a tighter ratio: 22 questions in 20 minutes.

IBM campus hiring in India spans software engineering, data analytics, consulting, and client-services roles. The written test is the first filter. Current open drives are listed on IBM India’s employment page.

IBM Written Test at a Glance

Section	Questions	Time	Approx. time per question
Quantitative Aptitude	18	40 minutes	2 min 13 sec
Number Series	18	40 minutes	2 min 13 sec
Verbal Ability	22	20 minutes	55 sec
Total	58	100 minutes	—

The auto-advance is the defining feature of the Quantitative and Number Series sections. You cannot return to a question once the per-question time limit passes. The practical implication: if a question is taking too long, making a reasoned guess and moving on is a better call than spending 4 minutes on one problem and losing the next three.

IBM Quantitative Aptitude Section

18 questions in 40 minutes. The topics are standard placement aptitude: the same clusters that appear in most mass-hiring IT company written tests.

Topic	What it tests
Percentages	Percentage increase or decrease, compound effects
Ratios and Proportions	Ratio comparisons, direct and inverse proportion
Profit and Loss	Cost price, selling price, discount, markup
Time and Work	Individual rates, combined work, pipe-and-cistern variants
Time, Speed, and Distance	Average speed, relative motion problems
Averages	Weighted averages, change-in-average problems
Simple and Compound Interest	SI/CI formula application, instalment problems
Permutation and Combination	Arrangements, selections, group problems
Probability	Basic probability, combined event problems
HCF and LCM	Prime factorisation, application problems

Speed matters more than originality in this section. Standard shortcuts for percentages and ratios solve most problems faster than working from first principles. Time and Work tends to have the widest range of difficulty in this section. The FACE Prep time-and-work problems guide covers the core variants with worked shortcuts.

IBM Number Series Section

18 questions in 40 minutes. The Number Series section is scored separately from the Quantitative section and consistently trips up candidates who have practised by topic rather than by pattern type.

Five pattern families cover the bulk of IBM Number Series questions:

1. Arithmetic progressions: differences between consecutive terms are constant, or form a second-level arithmetic sequence (differences of differences are constant).
2. Square or cube sequences: the terms are perfect squares or cubes, or the differences between terms are perfect squares or cubes.
3. Geometric progressions: each term is the previous term multiplied or divided by a constant ratio.
4. Mixed-operation series: the pattern alternates between two operations (for example, adding and multiplying), or adds with step sizes that themselves increase by a fixed amount.
5. Compound patterns: two of the above types operating in parallel across odd and even positions, or alternating across the full sequence.

The classification move: after reading the series, check first whether the differences between consecutive terms are constant (arithmetic), then whether the differences of differences are constant (second-order arithmetic), then whether the ratios are constant (geometric), then whether the terms or differences look like squares or cubes. Classify first, then solve. That 20-second investment at the start of a question makes the remaining 100 seconds mechanical.

Worked Example: Finding the Missing Term (40, 54, 82, ?, 180, 250)

• Series: 40, 54, 82, ?, 180, 250
• Step 1: Compute differences between consecutive terms: 54 - 40 = 14; 82 - 54 = 28; 250 - 180 = 70
• Step 2: Differences so far are 14, 28, and 70. Check differences of differences: 28 - 14 = 14. If this is constant, the sequence of differences is 14, 28, 42, 56, 70 (adding 14 each time).
• Step 3: The missing difference is 42. Missing term = 82 + 42 = 124.
• Step 4: Verify: 124 + 56 = 180 ✓ and 180 + 70 = 250 ✓
• Answer: 124

Worked Example: Square-Number Differences (30, 34, 43, 59, 84, 120, ?)

• Series: 30, 34, 43, 59, 84, 120, ?
• Step 1: Compute differences: 34 - 30 = 4; 43 - 34 = 9; 59 - 43 = 16; 84 - 59 = 25; 120 - 84 = 36
• Step 2: Differences are 4, 9, 16, 25, 36. These are 2², 3², 4², 5², 6² (consecutive squares starting at 2²).
• Step 3: The next difference is 7² = 49. Missing term = 120 + 49 = 169.
• Answer: 169

Worked Example: Finding the Incorrect Term (6, 7, 9, 13, 26, 37, 69)

• Series: 6, 7, 9, 13, 26, 37, 69
• Step 1: Compute differences: 7 - 6 = 1; 9 - 7 = 2; 13 - 9 = 4; 26 - 13 = 13; 37 - 26 = 11; 69 - 37 = 32
• Step 2: 1, 2, 4 match powers of 2 (2⁰, 2¹, 2²). The next should be 2³ = 8, but the difference is 13. The term 26 is suspect.
• Step 3: If the fourth term were 21 instead of 26, the difference would be 21 - 13 = 8 = 2³ ✓. Then 21 + 16 = 37 ✓ (2⁴ = 16) and 37 + 32 = 69 ✓ (2⁵ = 32).
• Answer: 26 is the incorrect term. It should be 21.

IBM Verbal Ability (Business Communication) Section

22 questions in 20 minutes. IBM calls this section the Business Communication Test. The name signals what is being measured: IBM’s work involves client-facing communication, global team coordination, and documentation for international stakeholders. Language accuracy at professional standards is a real job requirement.

The time ratio is tighter here than in the other two sections: roughly 55 seconds per question.

Topic	Format
Reading Comprehension	Passage-based, with 4 to 5 questions per passage
Error Identification	Spot grammar and usage errors in a given sentence
Sentence Correction	Choose the corrected form or rewrite the sentence
Para-jumbles	Reorder a set of jumbled sentences into a coherent paragraph
Fill in the Blanks	Choose the right preposition, conjunction, or vocabulary word
Synonyms and Antonyms	Vocabulary range questions

Reading Comprehension passages require skimming for structure: identify the topic sentence and conclusion of each paragraph before answering questions. Candidates who read slowly and linearly run out of time. The other question types reward familiarity with standard English usage patterns built over time, not crammed in a single weekend.

Preparing for IBM’s Written Test

Three priorities, in order of impact.

Timed Mock Tests Under Test Conditions

Knowing how to solve a time-and-work problem is not enough if execution takes 5 minutes. The 2-minute-per-question pace in the Quantitative and Number Series sections requires automatic pattern recognition, not just conceptual understanding. Timed mock tests, reviewed question-by-question afterwards, are the only training method that builds that automaticity. Online platforms with auto-advance simulators are closer to the actual IBM test experience than untimed drill sets.

Number Series: Practise by Pattern Type

Random practice builds a large unsorted toolbox. Pattern-type practice builds a classification reflex. One session on second-order arithmetic progressions, one on square-or-cube difference sequences, one on geometric series, one on compound patterns: that approach means you enter each Number Series question with a decision tree rather than a blank slate. The classification decision at the start of a question is worth 20 seconds; it makes the remaining 100 seconds mechanical.

Verbal Section: RC Skimming and Active Reading

The editorial page of a major daily newspaper (The Hindu Business Line, Business Standard, or Mint) gives you high-density English prose in topics similar to what IBM’s RC passages draw from. Fifteen minutes of active daily reading, noting the structure of arguments rather than just absorbing information, builds RC speed faster than drilling grammar rules in isolation. Grammar error-identification improves as a byproduct, since active readers notice deviations from standard usage naturally.

For recommended resources covering each of these sections, see the FACE Prep placement preparation book guide. For a broader look at how aptitude tests are structured across companies, the campus placement evaluation test guide covers the full three-section format that IBM and most other campus recruiters use.

IBM’s Number Series section gives you about 2 minutes per question to identify a pattern you’ve never seen, classify it, and solve it cold. The underlying skill is spotting structure in unfamiliar data and responding systematically. That same skill applies directly to working with AI tools: evaluating model outputs, identifying where a response pattern breaks down, and knowing when to adjust the approach. If you want to develop that in an AI context, TinkerLLM at ₹299 gives you real LLM tasks to work through without committing to a full course.