This post is part of the Sunday Series for Compelling GRE Workshops.
Many people fall in to the trap in doing math operations in one direction, but never practice doing them in the reverse direction.
Imagine a 45-45-90 triangle.
Its two short legs are of length "x".
The SAT and GRE both require you to know that the hypotenuse is sqrt(2)*x.
This is basically a short-hand method of the Pythagorean Theorem, allowing you to do the math faster and save time.
Many students know this, so the GRE test creators will instead give you a 45-45-90 triangle and give you a nice whole number for the hypotenuse (for example: 3) and then require you to calculate the length of each leg.
Now this would take a student longer to figure out, wasting precious time.
The answer of course is that each leg is 3/(sqrt(2)).
It is the reversal of the operation that the GRE test makers like to throw at students as one component of a single problem. And since you only have 40 minutes for thirty problems, you have to hurry!
Make it a great day!
-Daniel
Many people fall in to the trap in doing math operations in one direction, but never practice doing them in the reverse direction.
Imagine a 45-45-90 triangle.
Its two short legs are of length "x".
The SAT and GRE both require you to know that the hypotenuse is sqrt(2)*x.
This is basically a short-hand method of the Pythagorean Theorem, allowing you to do the math faster and save time.
Many students know this, so the GRE test creators will instead give you a 45-45-90 triangle and give you a nice whole number for the hypotenuse (for example: 3) and then require you to calculate the length of each leg.
Now this would take a student longer to figure out, wasting precious time.
The answer of course is that each leg is 3/(sqrt(2)).
It is the reversal of the operation that the GRE test makers like to throw at students as one component of a single problem. And since you only have 40 minutes for thirty problems, you have to hurry!
Make it a great day!
-Daniel