##### Select difficulty:

##### Select missing value:

__Instructions__

You will be given a list of sequences, and the goal is to figure out the missing number in each of the sequences.
The answer can be in form of an integer or fraction e.g. `3/4`

. An answer in the form of a fraction has to be in irreducible format.
E.g. `1/3`

is a potentially correct answer, but `2/6`

will not be accepted.
You can move to previous/next sequence by hitting the `Ctrl + LeftArrowKey`

and `Ctrl + RightArrowKey`

arrows keys.
Each test has a time limit of 10 minutes. After the time is up, your anwsers will be automatically submitted. Each correct anwser is +1, no answer 0, wrong answer -1.