![Sum of Odd Numbers](https://adding.info/Images/sum-of-odd-numbers.png)
"The sum of the first 73 odd numbers" means that we want to add together the first 73 positive odd numbers. The list of the first 73 odd numbers starts with 1 and ends with 145. Thus, this is what we know:
Numbers = 73
First = 1
Last = 145
Below is the formula, calculation, and answer to "the sum of the first 73 odd numbers?":
(Numbers/2) x (First + Last)
(73/2) x (1 + 145)
= 5329
The method above requires us to first figure out what the last number is on the list of the first 73 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 73 odd numbers is:
732 = 5329
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 74 odd numbers?
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