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Sum of Integers from 1 to 25

Here, we will not only tell you what the sum of integers from 1 to 25 is, but also show you how to calculate it fast. The sum of the integers from 1 to 25 is as follows:


To get the answer above, you could add up all the digits like 1+2+3... +25, but there is a much easier way to do it! Use the following formula:

n(n + 1)/2 = Sum of Integers

In this case, n=25, thus you get your answer by entering 25 in the formula like this:

25(25 + 1)/2 = 325

Sum of Integers from 1 to 26
Do you think you can do it on your own now? Try with one more integer before you go here to check your answer!

Sum of Integers Calculator
To get the sum of integers from 1 up to another number, please enter that other number here:


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