Estimating square roots in your head
&gt; We start by finding a number that forms a perfect square that is close to 33. Here, let’s pick g=6, since 6^2=36.<p>As somebody who is numerically essentially blind I&#x27;m not only incredibly jealous and in awe of most of the comments in this thread but also utterly perplexed by the above. How does that even come to mind that 6 is a good starting value? Do you people just intuit this stuff or do you rapidly run through the options? If you&#x27;re asking me to come up with something that when multiplied by itself is something near 33 then you&#x27;re in for a long wait.<p>There&#x27;s another comment in this thread:<p>&gt;Everyone generally knows the perfect squares up to at least 12, and then for bigger values, you can use even powers of 2, which I assume people also know.<p>Do they? Jeez.