Source: John Gregory & Dale Seymour's *Limerick Number Puzzles* (Creative Publications, 1978)

**Hint:** Take one clue at a time in the order given...try to write down what options remain at each step.

**Solution Commentary:** Algebra is not needed to solve these limericks. Rather the key is to think your way to a solution using problem solving skills such as establishing special cases, looking for patterns, building tables, etc.

For example, in Limerick #1, start with the set of one-digit primes (these are not that many options!) and produce all possible products. then focus on the next clue, etc.

For each, ask if the answer unique?

Finally, I wish this resource book was still in print. My students always enjoyed these limericks and learned alot about the reasoning process as a precursor to the formal proof process....plus they got a good review of common mathematical concepts and words. I will try to include more limericks later on.