This lesson grouping provides students with a wide variety of tricks and techniques to determine if one number is divisible by another number. It is 2 of 6 in the series titled "Divisibility."

This lesson will demonstrate patterns that emerge when multiplying or dividing by multiples of ten.

This video introduces early, easy to remember, prime numbers.

This lesson answers the question: Is 0 a prime number? Students should know the definition of a prime number before watching this video. It is 1 of 6 in the series titled "Zero and Primality."

How could random numbers speed up a decision algorithm? This video introduces randomized algorithms.