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For example, 7 + 7 = 14, 14 + 7 = 21, and so on (these will be all the multiples of 7 in the list) such as 14, 21, 28, 35, 42, 49, 56, 63 and so on up to 100 Step 5: 7 is the next number in the list after 5 the next step would be to cross out every 7th number in the list after 7, by adding 7 or skip counting by 7s.For example, 5 + 5 = 10, 10 + 5 = 15, and so on (these will be all the multiples of 5 in the list): Such as 10, 15, 20, 25, 30 and so on up to 100 Step 4: 5 is the next number in the list after 3 cross out every 5th number in the list after 5 by adding 5 or skip counting by 5s.
![list of prime numbers up to 50 list of prime numbers up to 50](https://i.ytimg.com/vi/FBbHzy7v2Kg/maxresdefault.jpg)
For example, 3 + 3 = 6, 6 + 3 = 9, and so on (these will be all the multiples of 3 in the list): Such as 6, 9,12, 15, 18, 21, 24 and so on up to 100 Step 3: 3 is the next number in the list after cross out every 3rd number in the list after 3 by adding 3 or skip counting by 3s.For example, 2 + 2 = 4, 4 + 2 = 6, and so on (these will be all the multiples of 2 in the list): Such as 4, 6, 8, 10, 12, 14, 16 and so on up to 100 Step 2: The number 2 is the first number in the list and it is a prime number too cross out every 2nd number in the list after 2 by adding 2 or skip counting by 2s.Leave the number 1 as all prime numbers are greater than one.
![list of prime numbers up to 50 list of prime numbers up to 50](https://d2cyt36b7wnvt9.cloudfront.net/exams/wp-content/uploads/2021/03/04225943/Marketing-Team-BLOG-FEATURED-IMAGE-1200-X-8001.png)
Following are the steps to find all the prime numbers up to 100 by Eratosthenes' method. It is an ancient method for finding all the prime numbers up to any given limit. We can find prime numbers in mathematics by using an ancient technique that is the sieve of Eratosthenes.