Quick: here’s an expression from a GRE math problem. How do you simplify it?

√2¹⁴+2¹⁷ 

As a long-time GRE teacher, I like collecting problems like these: ones that often reveal the math misconceptions we don’t even know we have! There are a lot of different wrong ways to simplify this expression. Try it out before you keep reading—then we’ll look at some other math myths and common mistakes, and how to avoid second-guessing on the GRE. 

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There’s nothing wrong with making GRE math errors because the problem is too hard. That’s just the way that the test is designed—there are Quant questions on the GRE that will challenge even the mathematical geniuses among us. However, it’s much more frustrating to miss a problem that you could’ve gotten right, just because you made a silly mistake. Try out the following tips to cut down on careless GRE math errors. Read more