### There are 25 prime numbers less than 100 is their sum even or odd?

The sum of the 25 primes less than 100 is even (it is 1060). The first prime number is 2. Every other prime number is odd. So, of the 25 primes less than 100, one is even and 24 are odd. Any two odd numbers sum to an even number. Therefore, an even number of odd numbers has an even sum. So the sum of 24 odd numbers is even. Therefore, the sum of the… Read More

### What number has 24 as the product of its digits and the sum of its digits is a prime number?

There are two numbers that satisfy the criteria. 38 and 83

### Is the sum of a prime number and a composite number always even?

No, the sum of a prime number and a composite number is not always even.

### When adding 2 prime number will the answer be prime?

The sum of any two prime numbers may or may not be prime. The sum of the two prime numbers 2 and 3 is the prime number 5, and the sum of the two prime numbers 5 and 7 is the composite number 12.

### What are the numbers as sum of 2 prime numbers?

The sum of two prime numbers greater than 2 is an even number. The sum of 2 and any other prime number is an odd number.

### Is the sum of any two prime numbers always a composite number?

The sum of any two prime numbers is not always a composite number. The sum of 2 and 11 is 13, and 13 is a prime number, not a composite number.

### In how many ways can 47 be written as the sum of two prime numbers?

It cannot be. If 47 is the sum of two prime numbers, one must be an even number and one must be an odd number, because that is the only way to have a sum that is an odd number, such as 47. The only even prime number is 2. The number that with 2 will have a sum of 47 is 45. However, 45 is not a prime number. Therefore, there are not two… Read More

### What is the sum of the 13th and 14th and 15th prime numbers?

sum of the 13th and 14th and 15th prime numbers = 131 1st to 12 prime numbers = 2, 3,5,7,11,13,17,19,23,29,31,37 13th prime number = 41 14th prime number = 43 15th prime number = 47 ================= sum.......................=131

### What 3 prime numbers have the sum of 3?

There are not three prime numbers that have the sum of 3. The smallest prime number is 2. If all three prime numbers were 2, the sum would 2 + 2 + 2 = 6, so that is the smallest number that is the sum of three prime numbers.

### What is the probability that the sum is a prime number?

The answer depends on the sum of WHAT!

### What is the smallest prime number that is a factor of the sum of 32009 and 52009?

The smallest prime number that is a factor of the sum of 32009 and 52009 is: 2

### What is the sum of the first four prime number?

The sum of the first four prime numbers is 17.

### What is the sum of the 5th prime number and the 5th Fibonacci number?

The 5th prime number is 11, and the 5th Fibonacci number is 5. The sum will be 11 + 5 = 16

### What are two prime numbers less than 20 who's sum is also a prime number?

(2,3) and (2,5) are the two pairs such that the sum of their elements is a prime number.

### What is the only prime number that is the sum of four consecutive prime numbers?

17 is the only prime number that is the sum of four consecutive prime numbers. 2 + 3 + 5 + 7 = 17

### Does the sum of two prime numbers equal a prime number?

If one of the two numbers is 2, the sum of two prime numbers may sometimes be a prime number. Examples of this are 2 + 11 = 13, 2 + 521 = 523, 2 + 281 = 283. There are an infinite number of similar examples where the sum of 2 plus a prime is another prime. However if neither number is 2, then the sum of two prime numbers is always an even… Read More

### What two prime numbers have a sum of 54 and 84?

If two prime number have a sum of 54 they cannot have a sum of 84, and conversely.

### If you add a prime number to itself is the the sum composite or prime?

The sum of two prime numbers will be composite unless one of the prime numbers is 2.

### A prime number times another prime number is?

If you multiply two prime numbers, the product (result) will be a composite number, not a prime number. A prime number has exactly two factors, 1 and itself. The product of two prime numbers will have those two numbers as factors, as well. The sum of two prime numbers might be prime if one of those two numbers is 2, the only even prime number, but otherwise it will not be a prime because two… Read More

### Below 40 a prime number the sum of its digits is 11?

what number is prime to 40 29 - it's a prime number (divisible only by 1 and itself) and if you sum the two digits 2 + 9 = 11

### Is the sum of prime numbers also a prime number?

Sometimes. 2 + 3 = 5 (prime number) 5 + 7 = 12 (not a prime number)

### Who discovered when any even number added with a prime number makes a whole number?

It doesn't have to be a prime number and an even number. The sum of any two whole numbers is a whole number. Also, the sum of two even numbers is an even number, the sum of two odd numbers is an even number, and the sum of an odd number and an even number is an odd number.

### Which composite number from six to twenty is closest in value to the sum of its prime factors?

The sum of the prime factors of 6 is closest in value to the composite number 6.

### Are 2 and 3 a prime factor of 24?

Yes 2 and 3 are prime factors of 24 because; 2 is a prime number and fits in to 24 3 is a prime number and fits into 24

### Write a pair of number which have a sum of 11 and a product of 24?

Write a pair of number which have a sum of 11 and a product of 24?

### How can you tell if 24 is a prime number?

24 is a prime number if it has factors of only 1 and 24. In this case, 24 is NOT a prime number since its factors are (2, 12), (3, 8), (4, 6).

### What is the sum of all the even prime factors of 48?

It is only possible to have one even prime factor of any number - as there is only one even prime number, 2. The sum of these is therefore 2.

### How many pairs of prime numbers are there to express 24 as the sum of two prime numbers?

There are three pairs.

### Can the sum of two prime numbers be a prime number without the two?

Without using the number two, it is not possible to sum two prime numbers at get a prime number as a result. This is because all prime numbers (except for 2) are odd, and the sum of two odd numbers is always even. The only even prime number is 2. The only way to add two non-zero positive numbers to get 2 is 1+1, and 1 is not a prime number (since it only has… Read More

### What 2 prime numbers whose sum is not a prime number?

Becouse every prime number (except 2) is odd, the sum of 2 prime numbers will always be even (and 2 is the only even prime). The exceptions are 11 and 2 for example; 11 = prime, 2 = prime and 13=prime.

### What is the sum of the 10th prime number and the 10th composite number?

ok so this is a little hard umm... the 10th prime number is let's see: 1,2,3,5,7,11,13,17,19,23 <------ 23 And the 10th composite number is: 4,6,8,9,10,12,14,15,16,18<------- 18 SO 23 plus 18 ISSSSSS........... 41 So the sum of the 10th prime number and the 10th composite number is 41!!! * * * * * 1 is neither prime nor composite. So the tenth prime is actually 29 and the sum is 47.

### Is it possible to get a even number as the sum ofm three odd prime numbers?

The sum of three odd numbers will be odd, whether they are prime or not. The sum of three prime numbers can be even as long as one of them is 2.

### What is the sum of the smallest prime number and what is the greatest composite number less that ten explain your answer?

2 is the smallest prime number. 9 is the greatest composite number less than 10. The sum of 2 and 9 is 11.

### What is the sum of the prime numbers between 90 and 100?

The sum of prime numbers between 90 and 100 is 97, the only prime number between 90 and 100.

### Is 699 prime?

No. Since the sum of the digits is divisible by 3, (6 + 9 + 9 = 24), the whole number is divisible by 3. Since it has at least one additional factor in addition to '1' and itself, it's not prime.

### Which even prime numbers are the sum of 20?

There is only one prime number and it is '2' You cannot have any other even prime number

### What is the greatest 2 digit prime number that each of the 2 digits are prime and the 2 digits sum is prime as well?

The number is 23.

### What is the sum of a prime number from 0 to 100 that is a multiple of 5?

5, which is the only prime number which is a multiple of 5!

### Is the sum of two prime number aways even?

In all cases except when the prime number 2 is involved.