"The sum of the first 102 odd numbers" means that we want to add together the first 102 positive odd numbers. The list of the first 102 odd numbers starts with 1 and ends with 203. Thus, this is what we know:

Numbers = 102

First = 1

Last = 203

Below is the formula, calculation, and answer to "the sum of the first 102 odd numbers?":

(Numbers/2) x (First + Last)

(102/2) x (1 + 203)

=

**10404**

The method above requires us to first figure out what the last number is on the list of the first 102 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 102 odd numbers is:

102

^{2}=

**10404**

**Sum of Odd Numbers Calculator**

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**What is the sum of the first 103 odd numbers?**

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