# Abstract reasoning: letter sequence

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## What are letter sequences?

Letter sequences are similar to number sequences. Only in this case you do not have to determine which number comes nrxt in the series, but which letter comes next in the series. This mainly concerns the positions of the letters. In the series you will see that letters according to the alphabet increase with certain steps. That is why you should apply simple calculations here and master some simple language skills.

In general there are three types of letter strings and some exceptions possible:

- Single letter sequence.
- Double letter sequence.
- Position of letter sequence.
- Exceptions.

### Single letter sequence

Each letter in the alphabet represents a number. In this case, the A represents a 1 and the Z 26. In this case, you get normal number series where you first have to rewrite the letters to the correct number. You can then calculate the differences between the numbers and thus determine the new number and then the letter. This letter series can at most be 26. Therefore you will find simple calculations: addition and subtraction.

### Double letter sequence

In this case, the A represents 0 and J represents a 9. This way you can make every possible digit with the letters. Also in this case you get normal number series, but because there is no upper limit to the number series, you also get more options. With these letter sets you can expect the following calculations: addition, subtraction, division and multiplication.

### Position of letter sequence

With some letter sequences it is mainly about the position. Then you must move the same number of steps through the alphabet. There are different variations on this, so you can get multiple letters, each with its own pattern. You can also move from A to Z and vice versa. Finally, it can also happen that you “pass” the Z. Then you have to count from A again. You practice these types of letter sequences by making as many variations as possible.

### Exceptions:

In addition to the examples mentioned, you may also come across exceptions. Think of letters that correspond to the months (J, F, M, A, M, J, J, A, S, O, N and D), days, seasons or something else. You cannot prepare well for this form. It is only good to realize that exceptions are possible to which an answer cannot necessarily be found logically.

## Example of an easy letter sequence

### Types of exclusion relationships:

With exclusion, four of the five figures follow the rule. A number of simple connections are:

- Number: for example, the number of corners, planes, lines, figures.
- Shape: is the figure symmetrical, asymmetrical, does it occur in geometry?
- Size: how large are the figures, how many figures of what size do you find?
- Location: how are the figures positioned in relation to each other, are they always in a plane or are they always apart?
- Filling: what kind of filling do the figures have, is it always the same or always different?
- Lines: what lines are used, for example, dotted lines or solid lines?
- orners: what kind of corners are used, for example pointed or blunt corners?

### How to solve exclusion questions:

- Search for the relationship. There can of course also be several connections.
- Look at the answer options and select the options with the correct connection.
- If the answer does not seem to be in between, remove any answers that are not in any way related.

## Letter sequences

In some cognitive aptitude tests you get letter sequences. The letter sequences you will encounter are are generally according to the position letter sequence form. You will therefore have to determine how many steps are shifted each time in the alphabet.

The tricky thing about these letter sequences is that there are many types of variations. You must be able to switch quickly between numbers and letters. It is therefore important to practice well for this component.

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By preparing for your aptitude test you can easily pass the test. You are not cheating, you are getting prepared. If you have never solved number sequences or never even seen a figure sequence you will not get a high score on your test. You may even fail. By practicing, you will be familiar with such types of questions. Now, you can actually take the test.