What are prime numbers and composite numbers What is odd

What are prime numbers and composite numbers What is odd

Prime number: also called prime number. It refers to the number in a natural number greater than 1 which can not be divided by other natural numbers except 1 and the integer itself. In other words, natural numbers with only two positive factors (1 and itself) are prime numbers. Numbers larger than 1 but not prime numbers are called composite numbers. 1 and 0 are neither prime nor composite numbers
Composite number: refers to the natural number in addition to 1 and the number divisible, but also by other numbers divisible
Odd number: in integers, the number that can be divided by 2 is even, and the number that cannot be divided by 2 is odd. Even number can be represented by 2K, odd number can be represented by 2K + 1, where k is an integer. Odd number includes positive odd number and negative odd number