SOLUTION: what is the sum of all numbers between 1 and 122.

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Question 398592: what is the sum of all numbers between 1 and 122.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

In general to find the sum of all the numbers from 1 to N:
1+%2B+2+%2B+3+%2B+4++ . . . . ++N+=+%281+%2B+N%29%2A%28N%2F2%29
1+%2B+2+%2B+3+%2B+4++ . . . . ++122+=+%281+%2B+122%29%2A%28122%2F2%29
so,
+%281+%2B+122%29%2A%28122%2F2%29
+123%2A61=7503........