What is the smallest prime number greater than 10?Įxplanation: The smallest prime number greater than 10 is 11, which has exactly two positive divisors (namely, 1 and 11).ĥ. Which of the following is a composite number?Įxplanation: 15 is a composite number. It has more than two divisors, namely 1, 2, 3, and 6.ģ. Which of the following is not a prime number?Įxplanation: 6 is not a prime number. It has exactly two divisors, 1 and 17, and is not divisible by any other positive integer.Ģ. Which of the following is a prime number?Įxplanation: 17 is a prime number. Step 6: Continue the process until you reach the number you want to check.ġ. Step 5: Repeat the process for the next number in sequence, checking if it is prime. In the example of 5, it is not divisible by 2, 3, or 4, so it is a prime number. Step 4: If the number is not divisible by any of the integers, it is a prime number. For example, if you are checking the number 5 is prime, divide it by 2, 3, and 4. Step 3: Divide the number by all integers less than itself, starting with 2.
Step 2: Start with the number 2, as it is the first prime number. A prime number is a positive integer that is only divisible by 1 and itself. Step 1: First understand what is a prime number exactly.
The list of prime numbers from 1 to 100 are listed below: There are 25 prime numbers from 1 to 100. On the other hand, the number 7 is a prime number because its only positive divisors are 1 and 7. In other words, a composite number is a number that is not a prime number.įor example, the number 6 is a composite number because it has divisors other than 1 and 6, namely 2 and 3. While 1 is only divisible by itself and 1, it does not have exactly two divisors, since the definition of a prime number requires that a number have at least two distinct divisors (not counting 1 and itself).Ī composite number is a positive integer that has at least one positive divisor other than 1 and itself. NOTE: 1 is neither a prime nor composite number. However, 4 is a composite number because it is a product (1 x 2 × 2) in which both numbers are smaller than 4. Numbers 2, 3, 5, 7, 11, and 13 are all prime numbers, but 4, 6, 8, 9, and 10 are not, because they can be divided evenly by numbers other than 1 and themselves.įor example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself. The prime number starts from 2, 2 is the smallest prime number. This means a prime number is a positive integer greater than 1 that has no positive integer divisors other than 1 and itself. The reading material provided on this page for Prime Numbers is specifically designed for students in grades 5 and 6.Ī prime number is a natural number which is only divisible by 1 and itself.
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