Why is there sometimes a remainder in division

How to solve it and what thw answer is

Which statement best describes a square? a. a special rectangle that has four right angles b. a special trapezoid that has four sides of equal length c. a special rectangle that has four sides of equal length d. a special trapezoid that has four right angles

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?