Question

If each mark represents one unit, which number does A represent?
(the picture is down below :)

Answer 1

A represents 77 units
You take the only number given (75) and count the tick marks, adding one every time you go right, subtracting one every time you go left. Mark A is 2 tick marks to the right of 75, so you add 2 to 75, making 77 units