PSAT: Questions

College & Grad School

Word of the Day

sustain
Definition: (verb) to keep in existence or continue.
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Math Teaser

Problem
Each member of a research group visited either the Virgin Islands or Hawaii...

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SAT* Tip of the Day

So What?
Math questions involving two equations and two unknowns can usually be combined into one equation with one unknown.
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PSAT: Grid In Question #3

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Question:

Given that

, find

x²

The correct answer is 82.81.

If you know your decimal equivalences by heart, you can rapidly solve this one by renaming the fractions as decimals:

.2 + .4 + .5 + 8

1.1 + 8

9.1

x²	( =9.1 ) ²

x²

82.81

But wait, we are asked to find

x²

. The correct answer is:

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