Pyramid Math Puzzle Challenge: Can you fill in the missing numbers?

Take Dr. McMullen’s pyramid math puzzle challenge. Can you figure out the missing numbers in each puzzle? Note: These are challenging puzzles for math lovers. They are not simple fill-in puzzles, and the patterns are usually not trivial lists of numbers in order, but involve mathematical operations (or combinations of them) or special sequences (like prime numbers).

These math puzzles add another dimension to pattern recognition and problem solving, since patterns can run in more than one direction.

The solution to every puzzle can be found at the back of the book.