### 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…

### Is 156 a prime?

156 is a not a prime number. A prime number is a number that only can divided by 1 and itself. Examples of Primes is 1, 2,3, 5, 7, 11, 13, 17.......................... 156 factors include 1,2,3,4,6,12,13,26,39,52,78,156. A easy way to figure out if a prime number is a prime number or not look and see if the last digit in the number. If the digit is even is it not a prime number.

### If you add a prime number and a prime number will the sum always be prime?

If you add two prime numbers that are odd numbers, the sum will be an even number. Because even numbers are divisible by 2, no even number greater than 2 is a prime number. Here are some examples: 3 + 3 = 6 which is an even number and thus not a prime number 5 + 7 = 12 which is an even number and thus not a prime number 11 + 13 = 24…

### What is the term prime and prime numbers in math?

A prime, or prime number, is a number greater than 1, whose only factors are 1 and itself. For example, the first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, ... (note: the set of prime numbers is infinite). As you can see, all prime numbers except 2 are odd. Further examples: 9 is not a prime number, since it is divisible by 3. 15 is not a…

### When a prime number has only two factors if you circle a prime number in the factor game your opponent will receive at most one point explain why give some examples?

A prime number has two factors: one and the number itself. When you circle a prime number, you get points for the number, your opponent gets points for the other factor, which is one. 23 is a prime number. You get 23, your opponent gets one. 37 is a prime number. You get 37 points, your opponent gets one.

### What number has the leat amount of factor?

A factor of a number is a number that the original number can divide by evenly. A prime number is a number with only 2 factors (1 and itself). From these two pieces of information, it is clear that the numbers with the least amount of factors are prime numbers. Examples of prime numbers include 2, 3, 5 and 7.

### Is the difference of two prime numbers a prime number?

Not necessarily. 71 is a prime number, 7 is a prime number, and 71-7= 64, which is NOT a prime number. In most cases, the difference of two prime numbers will not be a prime number. All prime numbers greater than 2 will be odd numbers. The difference between two odd numbers will be an even number. Unless that even number is 2, it is not a prime number. Here are some additional examples: 19…

### What are three examples of prime numbers and why are they prime?

Some prime numbers are 2, 7, 19 (more: 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47...) Prime numbers are considered to be prime when their factors only include 1 and itself. The factors have to be whole numbers. 2 is the only even prime number. 1x2=2. No other combination will work. 7 is another prime number. 1x7=7. You can also find no other combination of whole numbers that will multiply to equal 7. 19 is another prime number. You cannot find another…

### What number has only one factor and is not a prime number?

The number '1' as it has only one factor(1 itself). It is not a prime number as a prime number is a number which has exactly two factors--one is that number itself and the other is 1, examples of prime numbers are: 5(factors 1&5 only), 7(factors 1&7 only), 13(factors 1&13 only) and so on... Any number which has more than two factors is called a composite number. Examples are: 6(factors 1,2,3&6), 8(factors 1,2,4&8), 12(factors 1,2,3,4,6,12)…

### 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…

### Why or why not can a fraction be simplified if the numerator is a prime number?

"7" is a prime number. But you can simplify 7/14, 7/21,/7/28, and so on. Answer: If the denominator is also a multiple of the prime number, then the fraction can be simplified; otherwise, it cannot. To simplify any fraction, the numerator and denominator must have a factor in common, as in the examples above.