16, 25, 34, 43, 52, 61, 70
They add up to 55
18
90. all the numbers from 10 through 99
175
Add the two numbers together and then divide by two. Assume the two number is 10 and 20. Add them together (30) and divide by 2 (15).
There are no prime numbers at all between 10.
To find the sum of all even numbers between 10 and 20, we first need to identify the even numbers in that range. The even numbers between 10 and 20 are 10, 12, 14, 16, and 18. Adding these numbers together, we get 10 + 12 + 14 + 16 + 18 = 70. Therefore, the sum of all even numbers between 10 and 20 is 70.
no 3 numbers add to equal 10 and multiply to equal 40.
The sum of all prime numbers between 10 and 16 is 41.
55
The sum of all even numbers between 10 and 20 can be found by adding the even numbers in that range. The even numbers between 10 and 20 are 12, 14, 16, and 18. Adding these numbers together, 12 + 14 + 16 + 18 equals 60. Therefore, the sum of all even numbers between 10 and 20 is 60.
The prime numbers between 10 and 15 are 11 and 13.
It means that you add up all the numbers in a set of numbers, then divide by the size of the set. For example, if you have 10 numbers, you add them all up and divide the result by 10.The average is also known as "arithmetic mean".
Same as average. For example, if you have 5 numbers, add them all up, then divide the result by 5. If you have 10 numbers, you add and divide by 10, etc.
Average, in a way, is a sort of central value; if you take an "average" of several numbers, some of the numbers will be above, some below, that average.The calculation is to add all the numbers, then divide by the number of numbers (i.e., if you have 10 numbers, add all of them, then divide by 10).
2
You know that sum of the first n whole numbers is n(n+1)/2. ( it is the same as the first n natural numbers since the zero does not add anything) So lets say you want the sum of all the whole numbers between 3 and 10. ( I made it easy to illustrate the idea.) The sum of the whole numbers between 0 and 3 is 3(4)/2=6 The sum of the whole numbers between 0 and 10 is 10(11)/2=55 So the sum of the whole numbers between 3 and 10 is the (sum of the whole number between 0 and 10) -(sum of whole numbers between 0 and 3) which is 55-6=49 So in general, for whole numbers m and n with m