Diagrammatic Reasoning Tests- Everything you need to know

Welcome to our Diagrammatic Reasoning Test Guide. On this page you’ll find practice tests, coaching videos & 6 Top Tips for success.

Useful Starting-point Resources

Download our Ultimate Assessment Day & Interview Guide 2022 here. (It's packed with tips, tricks and insider-secrets to help you succeed.)

Ok, let’s cover the basics first. Then we’ll get into the detail of how to pass your diagrammatic reasoning practice test.

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What Is a Diagrammatic Reasoning Test?

diagrammatic-reasoning-tests A diagrammatic reasoning test is very similar to a logical reasoning test. It’s an assessment that measures your ability to interpret data and solve problems.

Diagrammatic reasoning tests are often used by companies to assess candidates who have applied for technical roles, or roles that require complex problem solving.

Although diagrammatic reasoning tests are often accompanied by tests for numerical reasoning and verbal reasoning, many employers choose diagrammatic reasoning tests because they measure innate ability; skills that are less dependent on your cultural or educational background.

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How Long is the Test and How Will I Sit It?

Unlike most other forms of aptitude testing a diagrammatic reasoning test may be computer based or paper-based. Either way, you can generally expect to answer around 20 questions, within a 30-minute time frame.

So What’s in the Test?

There is a standard format for most diagrammatic reasoning tests:

  1. You will be presented with visual information, in the form of diagrams or flowcharts.
  2. You will need to analyse the diagrams and then come to a conclusion as to the ‘rules’ that the diagram follows.
  3. You will then be asked to apply those rules by answering a ‘fill in the blank’ question or to specify how those rules might create a new situation of some kind.

Example Diagrammatic Reasoning Question

This is one of those times when a picture paints a thousand words. Let’s look at an example question:

Have a look at this question and see if you can tell which image should occupy the space marked below with a ‘?’.

practice diagrammatic reasoning

In the above example the top row highlights the sequence, along with its inherent ‘rules’. You job now is to figure out what those ‘rules’ are. What patterns can you spot in this top row?

If you can spot the patterns and ‘break the code’ then you will have no problem figuring out the correct answer. (To learn the answer to this question, scroll down under the below video.)

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Understanding Diagrammatic Reasoning Tests

Here’s a short video we made to walk you through the above example. This will tell you the type of thing you should be looking for during diagrammatic tests.

We hope you found that video helpful? Most people struggle to understand the type of elements they should even be looking for in a diagrammatic test, so we hope this video has made it clear (or at least got you thinking in a different way).

Example question answer: The correct answer is F. There are 4 variables here that you need to spot, 4 patterns:

  1. A central image that is increasingly getting larger.
  2. The colour of the central image has a sequence that runs: white, purple, blue, white, purple, blue.
  3. The shape of the outside image has a sequence that runs: square, square, octagon, square, square, octagon.
  4. The colours of the outer image – the sequence runs: purple, blue, white, purple, blue, white.

Are All Diagrammatic Reasoning Tests Like This?

Most diagrammatic reasoning tests use abstract reasonng images like the example question above, but some use letters and numbers instead of shapes.

The context may change but the principle remains exactly the same: Identity the rules/patterns contained in a sequence and then use them to pick an appropriate answer.

Sometimes there will also be ‘operators’ and ‘processors’ sandwiched in between the elements of the question. The aim here is to understand what effect these have on the input elements.

Again, the context has changed but the principle is the same: break the code/spot the pattern.

Here’s another example question for you to ponder. (No guidance or help this time!)


This Sounds Terrifying!

As with all aptitude tests, the key to success is practice. The more you practice your diagrammatic reasoning, the better you get. It’s as simple as that.

And this is particularly true with diagrammatic reasoning tests as the whole nature of the test is very abstract, so familiarity with the setting provides you with a real boost in both competence AND confidence.

We always recommend these practice diagrammatic tests from JobTestPrep as they contain clear explanations for each question. This is huge as it allows you to pinpoint where you’re weak and then improve in that area. This genuinely transforms your chances of success.


Ok, we’ve covered the basics of a diagrammatic reasoning test and we’ve looked at an example diagrammatic reasoning question. Now let’s look at some Top Tips for success.

Top Tip 1 ) Identify Your Test Supplier

Not all diagrammatic reasoning tests are the same. There are several test suppliers and you need to identify which test supplier made your test. This will allow you to practice tests made by that same supplier. This is a brilliant ‘sneaky’ tip that most of the other candidates won’t know about. Use it to your advantage.

You can learn more about the various test suppliers and find links to their tests on our aptitude testing page.

Top Tip 2) Take the Time to Understand

Don’t be afraid to take the time to truly understand what you are looking at. It’s very easy to get flustered during diagrammatic reasoning tests, but you must stay calm. Study the diagrams and get your eyes used to seeing them and manipulating the shapes.

diagrammatic-reasoning-test This is where your practice kicks in. Just getting to grips with the types of question you will face and the elements of the shapes and patterns takes time.

Giving yourself this time during your practice test period will reap huge rewards in your actual test.

Top Tip 3) Make Lots of Notes

It’s a good idea to note down the process functions and rules as you work them out.  Arrange your thoughts by making notes, it will help you keep track, as some sequences can be circular and you can quickly lose track of your thoughts.

Make sure you do this in a clear & methodical way as this type of testing can go horribly wrong if you misinterpret just one of the process functions.

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Top Tip 4) Improve Your Logic

Believe it or not, you can train your brain to think in a more logical way. How often do you solve puzzles? Crosswords? Sudoku?

ACTION POINT: Buy a few puzzle books from your local newsagents and run through them as part of your preparation. We don’t know why this works, but we know that it does. Get flexing those problem-solving mental muscles!

Top Tip 5) Manage Your Time Carefully

During your diagrammatic reasoning test you must manage your time wisely. Knowing when to cut your losses with a difficult question and move on is a key skill. It can only be honed with practice.

diagrammatic reasoning Understand how many questions are in your test. Allocate a period of time to each question. (Depending on your test supplier, you could have anywhere between 30-90 seconds per question.)

Don’t spend too long on one question.  If it is proving too difficult, leave it and come back to it at the end if you have time. In the time you agonise over 1 tricky question you could correctly answer 2, 3 or 4 questions. Don’t dally. Keep the momentum going.

Top Tip 6) Practice. Practice. Practice.

If there’s one thing that separates successful candidates from unsuccessful ones it’s this. Successful candidates always take the time to prepare.

There is nothing you can do to prepare that will give you a bigger boost in ability than taking practice tests.

Practising lets you get used to the types of diagrams you will encounter and it allows you to learn from your mistakes. We always recommend these practice tests as we like the explanations. Practice little and often. 30 minutes a day during the 2 weeks before your test is ideal.

Related ReadingHow to Pass Diagrammatic Reasoning Tests?

Thanks for reading!

We hope you found our Diagrammatic Reasoning Test Guide helpful?  We value your feedback and would love to hear how your test goes. You can contact us here. Good luck in your future career and in your diagrammatic reasoning test.

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More Useful Resources

Visit the aptitude testing page for more advice and guidance.

Check out our guide: ‘How to prepare for your interview or assessment centre’

You can find more help with assessment day activities (role-plays, group exercises, etc) in the assessment centre section.

These are some useful practice tests (here) and even another (here).

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