Easy Medium Hard

Easy FOIL forward

The computer scrambles the numbers you put in. You get to expand the
expression it comes up with.

Easy FOIL backward

Just like FOIL forward except that you factor the expression. The object
of the exercise is to find out which way the computer scrambled your
numbers.

Not so easy FOIL forward

In this exercise, the computer multiplies two of your numbers by -1, and
scrambles all your numbers.

Not so easy FOIL backward

Again, the computer multiplies two of your numbers by -1 and scrambles
all your numbers. It's up to you to figure out what the computer did.

Rocket science FOIL forward

This time, you don't know which of your numbers are multiplied by -1. It
might be all of them, or none of them, or ...

Rocket science FOIL backward

Same idea as rocket science FOIL forward. If you get 20 in a row right
in this section, maybe you should be teaching the class.

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