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The first number can be any one of 5. For each of those . . .
The second number can be any one of the remaining 4.
So there are (5 x 4) = 20 ways to sum 2 numbers out of 5.
But the sum of (A+B) and the sum of (B+A) are really both the same thing,
although they both count among the 20 different ways.
In fact, if you look at the 20 different ways, you'll find that there are actually
only 10 different pairs of numbers, and each pair shows up on the list as both
(A+B) and (B+A).
So the answer to the question is: 10
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What is the sum of 10 composite numbers?
There are infinitely many composite numbers. There are, therefore, infinitely many subsets of ten such numbers. There are, therefore, infinitely many possible sums.
If you tossed two cubes in the air and they are numbered one to six how many different sums are possible?
31 maybe? I am not sure.
What two prime numbers have a sum of 40 and 54 and 84?
Two prime numbers can have only one sum, not three different sums!
All the fact math there is about the number 25?
It is not possible to list all the facts. For example, there are infinitely many pairs of numbers that sum to 25. Then there are infinitely many triplets of numbers that sum to 25. And infinitely many quartets, and so on. And that is only sums. There are infinitely many pair of numbers that multiply to 25, and infinitely many triplets and so on.
How do you estimate mixed numbers sums?
you have to add
How many different sums can you make from 5 numbers?
you can make at least 25 sums
What is the sum of 10 composite numbers?
There are infinitely many composite numbers. There are, therefore, infinitely many subsets of ten such numbers. There are, therefore, infinitely many possible sums.
How many unique sums can be found by adding three different numbers from multiples of three up to thirty?
There are 22 such numbers.
If you tossed two cubes in the air and they are numbered one to six how many different sums are possible?
31 maybe? I am not sure.
How many sums equal 23?
Infinitely many. 12+11, 13+10, 14+9, ... , 22+1, 23+0, 24+(-1), 25+(-2), ... and then you have sums with numbers to one decimal place (dp) such as 11.6+11.4, and so on. Not forgetting numbers to 2 dp, 3, dp, 4, dp, ... , infinitely many dp. But these are only sums of two numbers. There are sums of 3 numbers, 4 numbers, ... infinitely many.
What two prime numbers have a sum of 40 and 54 and 84?
Two prime numbers can have only one sum, not three different sums!
All the fact math there is about the number 25?
It is not possible to list all the facts. For example, there are infinitely many pairs of numbers that sum to 25. Then there are infinitely many triplets of numbers that sum to 25. And infinitely many quartets, and so on. And that is only sums. There are infinitely many pair of numbers that multiply to 25, and infinitely many triplets and so on.
What two numbers add to 100 but add to 21?
121
How do you estimate mixed numbers sums?
you have to add
How many different sums when you roll 3 dice?
216/3 = 72
How many sums equal 24?
There is an infinite amount of numbers that can sum up to 24. Only 23, if you are just counting positive numbers.
What are consecutive sums?
Many numbers can be expressed as the sum of two or more consecutive integers. For example, the number 15 can be written as the sum of consecutive integers in three different ways: 15=7+8 15=4+5+6 15=1+2+3+4+5 Look at numbers other than 15 and find out all you can about writing them as sums of consecutive whole numbers.
