<p>Since sum of first n positive odd integers = n^2, you need to: </p>
<p>(# of positive odd integers less than 300)^2 - (# of positive odd integers less than 100)^2</p>
<p>to find the sum of the odd integers between the two. You can’t just add them up easily. You should use the relation they give. </p>
<p>I think…</p>