Clerical Aptitude Test: Question Types and Practice

Clerical aptitude tests look easy on paper. Put these five names in alphabetical order. Do these two account numbers match. Add up this invoice. Nobody fails because the questions are too hard. People fail because they rush, miss a swapped digit, or forget whether "Mac" files before "Mack", and they do it twenty times in ten minutes.

This guide is for anyone applying for an administrative, office support, receptionist, data processing, customer service or public sector clerical role. It explains what these tests measure, who publishes them, how they are scored, and gives eight practice questions covering the main item types, followed by a short preparation plan.

What Is a Clerical Aptitude Test?

A clerical aptitude test measures the skills that office work depends on: handling information quickly and without mistakes. Unlike a graduate reasoning test, it does not try to measure abstract problem solving. It asks whether you can sort, file, copy, code and check information accurately at speed, and whether your basic maths and written English are solid.

Typical sections include:

Alphabetising and filing: putting names, companies or records in the correct order, or deciding where a new file belongs.
Coding: translating information into codes using a key, or the reverse.
Checking (comparison): spotting differences between two versions of names, addresses, numbers or records.
Basic maths: addition, subtraction, percentages, simple invoices and totals.
Spelling, grammar and vocabulary: choosing correctly spelled words or the correct sentence.
Data entry or typing: sometimes added as a separate task. Our typing test guide covers WPM and keystrokes per hour.

Who Publishes Clerical Tests?

Many employers, especially in the public sector, write their own clerical tests. Others buy them from assessment publishers. Two documented examples:

Criteria Basic Skills Test (CBST). Criteria Corp, a US pre-employment testing publisher, says in its help centre that the CBST has 40 questions with a 20-minute time limit, that difficulty increases as you progress, and that it measures basic grammar, spelling, maths and language skills. Criteria positions it for entry-level clerical, administrative and customer service roles. Candidates receive a raw score out of 40 and a percentile.

Criteria Basic Skills Test 2 (CBST2). The newer version lets employers choose from five modules: mathematical reasoning, abstract reasoning, verbal reasoning, critical reasoning and checking accuracy. Criteria states that each module has 10 multiple-choice questions with a maximum of one minute per question, and typically takes about four minutes.

Older paper-based batteries existed too: the Buros Center for Testing lists the Clerical Abilities Battery (Pearson, 1985–1987) for hiring and promoting clerical staff, although Pearson reported it out of print in 2015. Large international publishers also sell checking and data entry tests, and many local authorities and government departments build their own. If your invitation names a publisher, prepare for that format. If not, practise all the item types below.

For checking items in depth, see our separate guide to the error checking test.

8 Clerical Practice Questions

These are our own practice items, not real test questions. Give yourself about six minutes for all eight.

Practice question 1 (alphabetising)

Using the rule "file by surname, then by first name, and treat nothing as coming before something", which name comes third?

Leeds, Anna
Lee, Tom
Lee, Sarah
Leeson, Mark
Leed, Paul

Options:

A. Lee, Tom
B. Leed, Paul
C. Leeds, Anna
D. Leeson, Mark

Answer: B. "Nothing before something" means Lee comes before Leed, which comes before Leeds, which comes before Leeson. The two Lees are then sorted by first name: Lee, Sarah, then Lee, Tom. Order: Lee Sarah, Lee Tom, Leed Paul, Leeds Anna, Leeson Mark. Third is Leed, Paul.

Practice question 2 (filing by number)

Files are stored by year, then by case number. Which file belongs directly after 2025/0418?

A. 2025/0481
B. 2025/0419
C. 2026/0001
D. 2024/0420

Answer: B. Within 2025, the next case number after 0418 is 0419. A comes later (0481 is higher than 0419), C is the next year, and D belongs to the year before. Watch the swapped digits in A: 0481 versus 0418 is the trap.

Practice question 3 (coding)

Use the key to code each customer request.

Request type	Code	Region	Code
Complaint	C	North	1
Refund	R	South	2
Information	I	East	3
Change of address	A	West	4

A customer in the East asks for a refund. What is the correct code?

A. R1
B. R3
C. 3R
D. I3

Answer: B. Refund is R and East is 3. The format in the key is letter then number, so 3R is wrong even though it contains the right elements. Coding tests often punish format errors as hard as content errors.

Practice question 4 (coding, reverse)

Using the same key, what does the code A4 mean?

A. Complaint, West
B. Change of address, North
C. Change of address, West
D. Information, West

Answer: C. A is change of address and 4 is West. The quickest method on a coding test is to keep the key visible and look up each part separately rather than relying on memory after the first few items.

Practice question 5 (checking)

How many of these pairs are exactly identical?

Margaret Okonkwo / Margaret Okonkwo
17 Riverside Close / 17 Riverside Clse
AC-55912-B / AC-55921-B
07700 900452 / 07700 900452
Brentford TW8 0LX / Brentford TW8 OLX

Options:

A. 1
B. 2
C. 3
D. 4

Answer: B. Only the first and fourth pairs are identical. The second has "Clse" instead of "Close", the third swaps 1 and 2, and the fifth has the letter O instead of the number zero in the postcode. Zero versus O and 1 versus l are standard traps.

Practice question 6 (basic maths)

An invoice lists 4 boxes of paper at £6.25 each, 3 toner cartridges at £24.00 each and a delivery charge of £5.50. What is the total?

A. £97.50
B. £102.50
C. £103.00
D. £108.50

Answer: B. Paper: 4 × 6.25 = £25.00. Toner: 3 × 24.00 = £72.00. Delivery: £5.50. Total: 25 + 72 + 5.50 = £102.50. Answer A forgets delivery.

Practice question 7 (basic maths)

An office orders 240 envelopes. 15% are damaged and returned. How many usable envelopes are left?

A. 36
B. 194
C. 204
D. 225

Answer: C. 10% of 240 is 24 and 5% is 12, so 15% is 36. 240 − 36 = 204. Option A gives the number returned, not the number left. Splitting percentages into 10% and 5% is faster than multiplying by 0.15 without a calculator.

Practice question 8 (spelling)

Which word is spelled correctly?

A. Accomodation
B. Accommodation
C. Acommodation
D. Accommadation

Answer: B. Accommodation has a double c and a double m. Spelling items in clerical tests tend to use words that come up in office correspondence: accommodation, separate, necessary, receive, correspondence, occurrence.

How Clerical Tests Are Scored

Most clerical tests count correct answers and compare your total with a norm group, giving a percentile. On the CBST, Criteria reports a raw score out of 40 and a percentile ranking. Criteria publishes norm statistics for the CBST in its help centre (a mean of 30.9 and median of 33 in its standardisation sample), which tells you something useful: many candidates answer most questions correctly, so small numbers of careless errors can move you a long way down the percentiles.

Some tests penalise wrong answers or report speed and accuracy separately. If the instructions mention a penalty, avoid random guessing at the end. If they do not, answer every question.

The employer sets the cut-off. A role that involves handling payments or personal data may set a higher bar for checking accuracy than one focused on reception work.

Common Mistakes

Rushing the first items. Early questions are easy, so people speed up and get careless. On tests where difficulty increases, those easy points matter.
Not knowing the filing rules. Check the instructions: some tests treat "Mc" and "Mac" as the same, some file numbers before letters, some ignore "The" at the start of a company name.
Reading for meaning instead of characters. In checking tasks your brain autocorrects "Clse" to "Close". Read character by character, or in small groups.
Losing track of the key. In coding tasks, write the key on scrap paper in shorthand if the test hides it between items.
Doing sums in your head that you could write down. Use scrap paper if it is allowed.

A One- to Two-Week Preparation Plan

1. Days 1 to 2: baseline

Do one timed practice set covering all item types. Note which type is slowest and which produces most errors. They are often not the same.

2. Days 3 to 5: accuracy routines

Build a fixed routine for each item type: for checking, compare in groups of three or four characters; for filing, write the first four letters of each name before sorting; for coding, say the code to yourself before choosing.

3. Days 6 to 9: maths and spelling

Practise mental arithmetic with money and percentages daily for 15 minutes. Our numerical reasoning practice questions go beyond clerical level, but the first questions are a good warm-up. Make a list of commonly misspelled office words and test yourself on it.

4. Days 10 to 13: timed mixed sets

Do mixed sets under time pressure, then review every error. Ask whether it was a knowledge gap (filing rule, spelling) or a process error (rushed, misread).

5. Day 14: full simulation

Take one full timed test in exam conditions, then rest.

Practical Tips for Test Day

Read the instructions for every section, especially filing rules and whether a calculator or scrap paper is allowed.
Use a quiet room and a laptop or desktop for online tests, with a mouse if possible.
Keep a steady pace. A clerical test rewards consistent accuracy more than bursts of speed.
Expect an interview as well. Office roles often include questions about organising your work and handling interruptions. Our guide to competency-based interview questions helps you prepare examples, and our government jobs aptitude test guide covers public sector processes.

If you want timed practice in the same formats, our free practice tests are a quick place to start.

Frequently Asked Questions

What is on a clerical aptitude test?

Most clerical tests mix several short tasks: alphabetising and filing, coding information using a key, checking two lists for differences, basic arithmetic, and spelling or grammar. The exact combination depends on the publisher and the role.

Is a clerical test hard?

The individual questions are simple. The difficulty comes from the time limit and from small details such as swapped digits or filing rules. Accuracy under time pressure is what the test really measures.

Can I use a calculator on a clerical test?

It depends on the test. Some basic skills tests are designed to be done without one, others allow an on-screen or desk calculator. The instructions tell you, so read them before starting and practise mental arithmetic either way.

How is a clerical aptitude test scored?

Usually by the number of correct answers, converted into a percentile against a comparison group. On Criteria's Basic Skills Test, for example, you receive a raw score out of 40 and a percentile. The employer decides which score is acceptable for the role.

How long should I prepare for a clerical test?

One to two weeks of short daily sessions is enough for most people. Focus on the formats you find slowest, practise under time pressure, and build a checking routine you use on every item.

About the author

Ingmar van Maurik is a specialist in test and interview preparation who helps candidates perform better in recruitment processes.

References

Criteria Corp, Criteria Basic Skills Test (CBST): https://criteriacorp.helpdocs.io/article/qji3g539j5-criteria-basic-skills-test-cbst Criteria Corp, Criteria Basic Skills Test 2 (CBST2): https://criteria.helpdocs.io/article/ty5mn9raog-cbst-2 Buros Center for Testing, Clerical Abilities Battery: https://marketplace.unl.edu/buros/clerical-abilities-battery.html

Clerical Aptitude Test: Question Types and Practice