
Multiplication Division Addition Whole numbers A prime number is a whole number, like 1, 2, 3, 4, 5, 6….. that can be evenly divided by ONLY two numbers: the number 1 and the prime number itself. Okay, maybe that's a bit hard to understand. Let's take a look at some examples: The number 5 is a prime number because it cannot be divided by any other numbers except for 5 and 1. The number 4 is not a prime number because it can be divided by 4, 2, and 1. Is the number 13 a prime number? It can't be divided by 2, 3, 4, 5, 6, 7, 8…etc. Only by 1 and 13. Yes, 13 is a prime number. Is the number 25 a prime number? It can't be divided by 2, 3, 4……true. Ah, but it can be divided by 5, so it is not a prime number. Here is a list of the prime numbers between 1 and 100: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 Take a look at a few of them and see if you can figure out any other number that they can be divided by other than the number itself or the number 1. (hint: we promise the answer is "no" and they are, therefore, prime numbers). Some tricks to prime numbers:
The fundamental theorem of arithmetic says that any number can be expressed by a unique product of prime numbers. Advanced Kids Math Subjects Back to Kids Math Back to Kids Study 

