CSE Analytical Ability: Practice Guide & Sample Questions
CSE Analytical Ability covers 40 of the 170 items on the Professional-level exam. It tests logical reasoning rather than factual knowledge: word analogies (relating a pair of words by some logical pattern), number series (finding the rule behind a sequence), logical inference (drawing valid conclusions from given statements), and arrangement/sequencing problems (ordering people or items according to a set of clues). Unlike Verbal or Numerical Ability, there's no vocabulary or arithmetic skill to build up over time — the skill here is pattern recognition and careful, step-by-step logic, which improves mainly through practicing the same few question formats repeatedly until the underlying methods become automatic.
This page walks through each of the four sub-types, the reasoning traps that catch examinees who rush, and gives worked sample questions with explanations that walk through the logic, not just the answer. Below the study material, a full practice quiz pulls Analytical Ability questions from Pasa's question bank.
Pasa is an independent study aid, not affiliated with the CSC or AFP.
What's tested
Word analogies present a pair of words with some relationship (e.g., DOCTOR:HOSPITAL) and ask you to find a second pair with the SAME relationship, from four options — the key is naming the exact relationship in the first pair before checking the options, rather than pattern-matching by feel. Number series items give a sequence of numbers with one term missing and require identifying the rule: a constant difference, a constant ratio, alternating operations, or a rule based on the position of each term. Logical inference items give 2-3 statements and ask what conclusion necessarily follows — the correct answer must be guaranteed true by the premises alone, not just plausible. Arrangement/sequencing problems describe a set of people or objects and a series of clues about their relative order or position — these are best solved by drawing out the arrangement and eliminating possibilities clue by clue.
| Sub-type | What it looks like |
|---|---|
| Word analogies | A:B :: C:? — find the matching relationship |
| Number series | Find the missing/next term in a sequence |
| Logical inference | What conclusion necessarily follows from given statements |
| Arrangement/sequencing | Order people/items using a set of clues |
Sample Questions
1. DOCTOR is to HOSPITAL as TEACHER is to ____.
- A. Student
- B. School
- C. Chalkboard
- D. Lesson
Correct answer: B — School
The relationship is profession-to-primary-workplace: a doctor's primary workplace is a hospital, so a teacher's primary workplace is a school. "Student" describes who a teacher works WITH, not where they work, and "Chalkboard"/"Lesson" are tools or products of teaching, not places.
2. What number should come next in the series? 3, 9, 27, 81, ____
- A. 162
- B. 216
- C. 243
- D. 324
Correct answer: C — 243
Each term is multiplied by 3 to get the next: 3×3=9, 9×3=27, 27×3=81, 81×3=243. A common mistake is switching to addition instead of recognizing the constant ratio — check whether dividing consecutive terms gives a constant result before assuming an additive pattern.
3. All licensed teachers passed the LET. Maria is a licensed teacher. Which conclusion necessarily follows?
- A. Maria passed the LET.
- B. Everyone who passed the LET is a licensed teacher.
- C. Maria has been teaching for many years.
- D. Maria wants to become a teacher.
Correct answer: A — Maria passed the LET.
Since "all licensed teachers passed the LET" and Maria is stated to be a licensed teacher, it necessarily follows that Maria passed the LET. Option B reverses the logic of the original statement — this does NOT mean everyone who passed the LET is a licensed teacher — one of the most common traps in logical inference items. C and D introduce information not stated anywhere in the premises.
4. DROUGHT is to FAMINE as EARTHQUAKE is to ____.
- A. Seismograph
- B. Fault line
- C. Destruction
- D. Tsunami
Correct answer: C — Destruction
The relationship is cause-to-general-effect: a drought's characteristic consequence is famine, and an earthquake's characteristic consequence is destruction — both the broad, typical result. "Tsunami" is tempting since it's caused by earthquakes, but it's a specific, not-always-occurring secondary event, unlike destruction, which is the general, near-universal consequence.
5. What number should come next in the series? 2, 5, 10, 17, 26, ____
- A. 35
- B. 36
- C. 37
- D. 39
Correct answer: C — 37
The differences between consecutive terms are 3, 5, 7, 9 — each difference itself increases by 2. Following the pattern, the next difference should be 11, giving 26 + 11 = 37. A common mistake is assuming a constant difference (like +9) instead of checking whether the differences themselves follow a pattern.
6. Some government employees are engineers. All engineers must pass a licensure exam. Which conclusion necessarily follows?
- A. Some government employees have passed a licensure exam.
- B. All government employees have passed a licensure exam.
- C. No government employees are unlicensed.
- D. All engineers are government employees.
Correct answer: A — Some government employees have passed a licensure exam.
Since SOME government employees are engineers, and ALL engineers must pass a licensure exam, it follows that at least some (the engineer subset) of government employees have passed a licensure exam. Option B overreaches — "some" doesn't mean "all" — nothing is guaranteed about the OTHER government employees who aren't engineers.
7. Five houses (P, Q, R, S, T) stand in a row. P is immediately to the left of Q. R is at the rightmost end. S is immediately to the left of T. Which of the following could be the correct order, left to right?
- A. P, Q, S, T, R
- B. S, T, P, Q, R
- C. P, Q, R, S, T
- D. S, P, Q, T, R
Correct answer: B — S, T, P, Q, R
Testing S, T, P, Q, R: P is immediately left of Q ✓ (positions 3-4), R is rightmost ✓ (position 5), S is immediately left of T ✓ (positions 1-2) — all three clues hold. Option C fails because R must be rightmost, but there it's in the middle. A common mistake is checking only one or two clues and stopping before verifying all of them against a candidate arrangement.
8. In a race, Ana finished before Ben. Carlo finished after Diego but before Ana. Who finished first?
- A. Ana
- B. Ben
- C. Carlo
- D. Diego
Correct answer: D — Diego
From "Carlo finished after Diego but before Ana," we get Diego → Carlo → Ana. Combined with "Ana finished before Ben," the full order is Diego → Carlo → Ana → Ben. Diego is first. A common mistake is assuming the person mentioned first in the passage (Ana) finished first — the order must be derived from the relational clues, not the sentence's reading order.
9. PAGE is to BOOK as ____ is to ORCHESTRA.
- A. Conductor
- B. Musician
- C. Symphony
- D. Concert
Correct answer: B — Musician
The relationship is part-to-whole: a page is one component part of a book, and a musician is one component part (member) of an orchestra. "Conductor" leads the orchestra rather than being an interchangeable component part of it, and "Symphony"/"Concert" are things an orchestra performs, not parts of the orchestra itself.
10. What number should come next in the series? 1, 4, 9, 16, 25, ____
- A. 30
- B. 35
- C. 36
- D. 49
Correct answer: C — 36
Each term is a perfect square in order: 1², 2², 3², 4², 5² — so the next term is 6² = 36. A common mistake is losing count of the sequence position and jumping to 7² = 49, skipping over 6² entirely, especially if the square pattern is spotted late without carefully re-counting from the first term.
Common Traps
In word analogies, the most common trap is choosing an option that's simply related to one of the original words, rather than one that mirrors the EXACT relationship between the original pair. Always state the relationship as a sentence (e.g., "a book's function is to be read") before scanning the options.
In number series, a common mistake is assuming the pattern is a simple constant difference when it's actually based on a changing difference or an entirely different operation. Write out the difference between each consecutive pair of terms before guessing — if the differences aren't constant, check if THOSE differences follow their own pattern.
In logical inference, the biggest trap is choosing a conclusion that's PROBABLY true in the real world, but isn't strictly guaranteed by the given statements — "All A are B; some C are A" only guarantees that some C are B, nothing about ALL C.
In arrangement problems, a common error is stopping as soon as one arrangement satisfies the clues you've checked so far, without confirming it's the ONLY arrangement consistent with ALL the clues.
Study Routine
Because this category rewards method over memorized facts, spend your first sessions on word analogies specifically: build a habit of naming the relationship type before looking at answer choices, since guessing by feel is the main source of errors here. Move to number series next, practicing a wide variety of pattern types so you can recognize each quickly. For logical inference, practice distinguishing "must be true" from "probably true" explicitly. For arrangement problems, always sketch the setup on scratch paper rather than tracking it in your head; errors here are almost always tracking errors, not logic errors. In your last week, mix all four types under time pressure, since recognizing the TYPE of problem quickly is itself part of the skill.
