The following activity is a practice exercise to help you measure your success under timed conditions. 

If you are unsure of an answer move on to the next question.  You should come back to questions you found difficult at the end if you have time.  

There are many different types of sequences. In letter pair sequences there are pairs of letters joined together by a common theme, normally the amount of space between them. Some follow a forwards sequence, while others follow a reverse alphabet sequence.

Here is the alphabet for you to use as a reference:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Look at the following letter sequence:

US is to QO as MK is to ___?

First, we have to work out how the first letter of the first pair (US) gets to the first letter of the second pair (QO).

To get from U to Q, we jump 4 places to the left.

Then we have to work out how the second letter of the first pair gets to the second letter of the second pair.

To get from S to O we also jump 4 places to the left.

This means we need to do the same to the letters M and K to work out the missing letters in our sequence.

This makes our missing letters IG.

So the answer is:

US is to QO as MK is to IG.

Now it's time to begin this practice exercise.  Good luck!