Hence, there are 4 prime numbers between 20 and 40. Prime numbers between 20 and 40 are 23, 29, 31, and 37. Therefore, the average of prime numbers between 1 and 20 is 9.625.Įxample 3: Write the prime numbers between 20 and 40, and identify the count of these numbers? Therefore, the difference between the first and last 10 prime numbers is 603.Įxample 2: What is the average of the prime numbers between 1 and 20? Prime numbers: A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. ![]() Prime factorization is a method to find prime numbers. A number can be a prime number if it is a non-zero whole number. ![]() ![]() Last 10 prime numbers are: 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 Important Notes Prime numbers are natural numbers greater than 1, that have only two factors, 1 and the number itself. Example 1: From 1 to 100, John counted the first 10 prime numbers and Max counted the last 10 prime numbers, what will be the difference between the sum of their count?įirst 10 prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29
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