What is the sum of the odd numbers from 1 through 179?

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Multiple Choice

What is the sum of the odd numbers from 1 through 179?

The sum of the first n odd numbers equals n^2. Here, the odd numbers from 1 to 179 form 90 terms, since 179 is the 90th odd number. So the total is 90^2 = 8,100.

You can also see this by the arithmetic-series idea: there are 90 terms, the average of the first and last is (1 + 179)/2 = 90, and 90 * 90 = 8,100.

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