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How many of the prime numbers between 10 and 20 can be written as the sum of two primes?
All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.
What is the sum of all prime numbers between 10 and 20?
The primes between ten and twenty are 11, 13, 17 and 19. Adding them together gives 60.
How many sets of 3 primes sum to 20?
One set is: 2+7+11 = 20
What prime number less than 20 can be written as a sum of differrent primes?
2 + 3 = 5
What is the sum of all prime numbers between 20 and 40?
The sum is: 23+29+31+37 = 120
How many of the prime numbers between 10 and 20 can be written as the sum of two primes?
All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.
What is the sum of all prime numbers between 10 and 20?
The primes between ten and twenty are 11, 13, 17 and 19. Adding them together gives 60.
What is the sum of all composite numbers between 10-20?
The sum is 75.
How many sets of 3 primes sum to 20?
One set is: 2+7+11 = 20
What prime number less than 20 can be written as a sum of differrent primes?
2 + 3 = 5
How many primes are there in between 0 and 20?
There are 9 prime numbers between 0 and 20: 1,2,3,5,7,11,13,17,19.
What is the sum between -5 and 20?
The sum of -5 and 20 is 15. The distance between -5 and 20 is 25. The sum of the numbers between -5 and 20 is 180. The sum of the numbers from -5 to 20 is 195.
What is the sum of all prime numbers between 20 and 40?
The sum is: 23+29+31+37 = 120
What is the ratio of number of primes and composites between 20 and 30?
It is 2:7
What are the prime numbers between 20 and 35?
The primes are 23, 29, and 31.
From 1-100 what are the prime numbers?
Primes less than 202, 3, 5, 7, 11, 13, 17, 19,Primes between 20 and 4023, 29, 31, 37,Primes between 40 and 6041, 43, 47, 53, 59,Primes between 60 and 8061, 67, 71, 73, 79,Primes between 80 and 10083, 89, 97
What is a number between 20 and 30 that is composite and the sum of that numbers prime factors is the greatest of all the composits between 20 and 30?
26
