So, there are total 25 prime numbers up to 100. The numbers marked yellow in the below chart are all the prime numbers up to 100.įollowing is the list of prime numbers up to 100: 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.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. 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. Integer factorization or prime factorization is the method to find prime numbers.Prime numbers cannot be divided by any other number except the number 1 and the number itself.
What is the least numbers called out in a game of bingo and a participant shouted for a "full-house", ie all 15 numbers came out?.How would you place the numbers 1 to 15 next to each other (without repeating any of them) in such a way that the sum of the numbers in any two consecutive space is always a square? The following are square numbers: 25 (5 X 5) and 144 (12 X 12). A whole number is said to be a square if it is equal to some whole number multiplied by itself.