A typical Scheme exam question

Note: this should not be taken seriously.

Define a procedure square that takes an argument x and returns its square. (12 marks)

Answer and marking scheme

(define (square x) (* x x))

4 marks for putting * x x in brackets
4 marks for putting square x in brackets
4 marks for putting everything in brackets

OR

(define square (lambda (x) (* x x)))

3 marks for putting * x x in brackets
3 marks for putting the first x in brackets
3 marks for putting lambda (x) (* x x) in brackets
3 marks for putting everything in brackets

By the way, in the real exam, which did not contain this question, I got 78% of the brackets in the right place despite going to SAD (now called Game On) the night before!