Lab Quiz Solutions, Foundations of Computing, Week 2 -- Oct 3, 2000

This quiz is just exercise 3.9 from Simply Scheme (p. 38 in the first edition).

The expression (+ 8 2) has the value 10. It is a compound expression made up of three atoms. For this quiz, write five other Scheme expressions whose values are also the number 10:

1. An atom
   

   10 --- not (10) !

2. Another compound expression made up of three atoms
   

   (- 12 2) --- many other expressions would work also

3. A compound expression made up of four atoms
   

   (+ 5 3 2) --- others would work

4. A compound expression made up of an atom and two compound subexpressions
   

   (+ (+ 3 2) (- 8 3)) -- others would work

5. Any other kind of expression
   

   (+ (* 4 2) 1 1) -- etc.