When 3n + 6 = 18, what is n?

The next 3 numbers are the 1st, 2nd and 3rd multiples of 6

2nd

The number after this is the first number times 4

The 10th number is n/4

This number is the highest squared number left

And square root that number

Whats the highest possible number

How many letters are in Kyrgyzstan

You should know

Whats the first prime number

This is the first number multiplied by the number you last typed in

Whats x if 5n - x = 5?

Then - 1

(Get the √ of the number of squares on a chessboard), then add x and - n

The 10th number x 5

The only single digit number left

Add 10 to that number

The lowest number left

AND WHATS LEFT?