What is the sum of the first 106 odd numbers?

Sum of the first 106 odd numbers

"The sum of the first 106 odd numbers" means that we want to add together the first 106 positive odd numbers. The list of the first 106 odd numbers starts with 1 and ends with 211. Thus, this is what we know:

Numbers = 106
First = 1
Last = 211

Below is the formula, calculation, and answer to "the sum of the first 106 odd numbers?":

(Numbers/2) x (First + Last)
(106/2) x (1 + 211)
= 11236

The method above requires us to first figure out what the last number is on the list of the first 106 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 106 odd numbers is:

106² = 11236

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What is the sum of the first 107 odd numbers?
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