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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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SAT: Grid-In Question #6

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Question:
 If  mk  =  64  and  m  =  k2  , what is the value of 
m
k
 ? 



We know that the product of m and k is 64, so let's use this piece of information to figure out possible values for m and k. List out the possible factor pairs of 64: 1 and 64, 2 and 32, 4 and 16, and 8 and 8. Now, which of these represents a set where one member (m) is the square of the other (k)? Only 4 and 16 fits our criteria: 16 is the square of 4. Hence, m = 16 and k = 4.


m
k
 = 
16
4
 =  4
 

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