What is the sum of the first 1243 odd numbers?

Sum of the first 1243 odd numbers

"The sum of the first 1243 odd numbers" means that we want to add together the first 1243 positive odd numbers. The list of the first 1243 odd numbers starts with 1 and ends with 2485. Thus, this is what we know:

Numbers = 1243
First = 1
Last = 2485

Below is the formula, calculation, and answer to "the sum of the first 1243 odd numbers?":

(Numbers/2) x (First + Last)
(1243/2) x (1 + 2485)
= 1545049

The method above requires us to first figure out what the last number is on the list of the first 1243 odd numbers. We like the formula method above, but there is an alternate faster way to add up odd numbers. You can get the answer fast by squaring the number. Once again, the sum of the first 1243 odd numbers is:

1243² = 1545049

Sum of Odd Numbers Calculator
Do you need the answer to a similar question? Get the answer to the sum of the first n odd numbers here!

What is the sum of the first 1244 odd numbers?
Here is the next set of odd numbers that we have added together for you.