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## Author: Chris Lele

Chris Lele is the GRE and SAT Curriculum Manager (and vocabulary wizard) at Magoosh Online Test Prep. In his time at Magoosh, he has inspired countless students across the globe, turning what is otherwise a daunting experience into an opportunity for learning, growth, and fun. Some of his students have even gone on to get near perfect scores. Chris is also very popular on the internet. His GRE channel on YouTube has over 10 million views. You can read Chris's awesome blog posts on the Magoosh GRE blog and High School blog! You can follow him on Twitter and Facebook!

Sometimes we want to force an equation on to every problem with unknowns. However, catch yourself if you suddenly hit a wall. What does that feel like? You are desperately scrambling to write some kind of equation and all you get are a bunch of scribbles and the sinking feeling that nobody could solve this […]

Prime numbers are one thing. Combining them with counting principles is an entirely different thing together. Let’s say I have a two-digit number. All you know is that both digits are prime numbers. So you could have 53, 37, etc. But how do you actually count up all these numbers without having to list them […]

You may have a child who is 6’6 and the star basketball player at his school. Or your child might come in a few inches short of the average and make up what he lacks on the court with some pretty mean dance moves. Such variability in height is apparent to everyone. But when it […]

n = (10^10 x 9^9 x 8^8…3^3 + 2^2 + 1^1)^2 How many zeroes does n^2 contain? First off, you need to recognize the pattern: every number has an exponent equal to itself, i.e. 10^10, 8^8 , etc. That means, that the (….) represents 7^7 x 6^6 x 5^5 x 4^4. Now that we can […]

Oh, the dread ratio. Especially on geometry questions! How dare they not give us numbers!? Actually, sometimes ratios can make things easier. The same goes for percents. If you are only looking for the percent by which one thing is bigger than another, the actual numbers don’t matter. Just choose easy-to-work-with number(s). The ratio of […]

Bars and pies? Yum, pass the ice cream! Charts? Whoa, sounds like a fun new board game. Well, in both cases you are mistaken. The most common graphs featured on the SAT math are bar graphs and pie charts. Having a basic understanding of these two graphs can go a long way on the SAT […]

The SAT knows you know your basic exponent rules. But it also knows how to still trick you. In the midst of the test, stressed out and trying to finish before the proctor yells out the dreaded “stop”, you might flub something. Do you add exponents if you multiply (only if the bases are the […]

Always pay attention to the level of difficulty of a question, which you can figure out based on how close to the end of the section a question is. If it is just seems way too easy, it might very well be a trap. So watch out for the first thing that jumps out at […]

No matter how you slice it, there are some tricks on the SAT. Tricks can mean anything from the little details (did you know that ‘0’ is an even integer?) to, well, stuff that is just plain tricky. For the first variant of trickiness, try the following: How many consecutive integers are from -5 to […]

Every now and then you’ll see a cube on the SAT in which a dotted line connects vertices on other ends of the cube. Your job is to find that line. This usually requires that you have to use the Pythagorean theorem twice (talk about cumbersome!). Luckily, I’m here to the rescue. When ever you […]