Prime numbers

2 videos
2 skills
Prime numbers have been studied by mathematicians and mystics for ages (seriously). They are both basic and mysterious. The more you explore them, the more you will realize that the universe is a fascinating place. This tutorial will introduce you to the magical world of prime numbers.

Prime numbers

VIDEO 8:13 minutes
Sal defines prime numbers and gives examples.

Recognizing prime and composite numbers

VIDEO 4:40 minutes
Can you recognize the prime numbers in this group of numbers? Which are prime, composite, or neither?

Identify prime numbers

Identify prime numbers less than 100.

Identify composite numbers

Identify composite numbers less than 100.