Prime numbers are numbers greater than 1 that are only divisible by 1 and themselves. The document lists prime numbers up to 100 and provides a procedure to determine if a given number is prime. It involves finding the square root of the number and testing divisibility against prime numbers below the square root. As an example, it shows 337 is a prime number since it is not divisible by any primes less than its square root of 19. Understanding prime numbers makes solving math homework involving them easier.
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How to find out whether a given number is Prime or not
1. Simple and easy tricks which are helpful to solve
your math homework problems
2. What is a prime number
A number is greater than 1 is called a prime
number, if it has only two factors, namely 1 and the
number itself.
Prime numbers up to 100 are: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
3. Procedure to find out the prime
number
Suppose A is given number.
Step 1: Find a whole number nearly greater than the
square root of A. K > square root(A)
Step 2: Test whether A is divisible by any prime
number less than K. If yes A is not a prime number. If
not, A is prime number.
4. Example
Find out whether 337 is a prime number or not?
Step 1: 19 > square root (337)
Prime numbers less than 19 are 2, 3, 5, 7, 11, 13, 17
Step 2: 337 is not divisible by any of them
Therefore 337 is a prime number
Understanding about prime numbers can help to
solve your math homework problems easily.
