2 + 3 + 5 + 7 = 17. It seems it is indeed the only one; if you want a sum of 19, you'll have to repeat one of the numbers, e.g., 2 + 3 + 7 + 7. You can't change the 7 to 9, since 9 is not a prime number.
17
There is no difference. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
The different between two different odd numbers are always an even number
There are infinitely many numbers between any two different numbers. To find a number exactly in the middle between two numbers, calculate the average. That is, add the two numbers, then divide the result by 2.
Arithmetic can be written as two different products of prime numbers. haha
17
There is no difference. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
The different between two different odd numbers are always an even number
Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
Rational numbers are numbers that can be written as a fraction. Real numbers are any number, including irrationals.
There are infinitely many numbers between any two different numbers. To find a number exactly in the middle between two numbers, calculate the average. That is, add the two numbers, then divide the result by 2.
17 = 2 + 3 + 5 + 7
There are infinitely many numbers between any two different numbers. To get the number that is exactly in the middle, add the two numbers, then divide the result by 2.
Arithmetic can be written as two different products of prime numbers. haha
Between any two different real numbers, there are infinitely many rational numbers.
There are infinitely many numbers between any two different numbers. One such, in this example, is 2.1756
Since the two numbers are the same, there is really no number that is strictly "between" them.In general, to calculate a number that is between two DIFFERENT numbers, just take the average of the two numbers. That will get you the number which is right in the middle between the two - which is just one of infinitely many numbers between them.