What is the work done in raising from the ground a brick wall of uniform thickness of height 2meter and 1000kg?

The work done in raising any object from the ground is independent of the nature of the object (its composition and girth). Hence the data provided ("brick wall of uniform thickness of height 2meter [sic]") is irrelevant. The work that is done in "raising from the ground" any object massing 1000kg is the same as the work done raising any other object massing 1000kg the same distance, for example, five pecks of osmium fashioned into the death mask of Albert Einstein.

It should be noted that the expression "to raise a wall" is sometimes used to mean the same thing as "to erect a wall", which clearly not at all the same thing as "to lift a wall". The point of idiotic exercises such as this is the entertainment of idiots and so the fact that terms are employed which are vague and consequently readily misinterpreted is to be expected. When human lives are at stake, for example in the design of bridges, such vagueness can have consequences which most people do not find amusing, for example, the death of the man and woman who conceived one.

The answer is 9806.65 Newton-meters per meter raised (a datum not provided). This neglects the lift, which cannot be calculated without knowing the thickness and length of the wall. likewise data not provided. The wall displaces a volume of air (which weighs about one gram per liter), and the work done is less as a result. The effective mass is the mass of the wall, less the mass of the air it displaces. Since the air mass displaced is a function of altitude the solution to the problem requires calculus. Similarly, the gravitational force exerted per kilogram of mass declines as the wall is lifted and a careful calculation of the work performed must take that into account as well. Since both of these quantities vary *within the range specified as 2meters from top to bottom* the problem is quite intricate when fully fleshed unless one makes simplifying assumptions (the force of gravity is the same throughout the wall, etc.) to obtain an approximation rather than the most precise answer possible.