Answer:
Step-by-step explanation:
Prime numbers definition: A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself.
Odd numbers vs even numbers:
An integer is <u>even</u> if it is divisible by two and <u>odd</u> if it is not even. For example, 6 is <u>even</u> because there is no remainder when dividing it by 2. But, 3, 5, 7, 21 leave a remainder of 1 when divided by 2.