2014 UNM-PNM Statewide High School Mathematics Contest II Problems/Problem 1


Four siblings BRYAN, BARRY, SARAH and SHANA are having their names monogrammed on their towels. Different letters may cost different amounts to monogram. If it costs $\textdollar{21}$ to monogram BRYAN, $\textdollar{25}$ to monogram BARRY and $\textdollar{18}$ to monogram SARAH, how much does it cost to monogram SHANA?


We set up the following equations:

$b+r+y+a+n= 21$

$b+a+2r+y= 25$

$s+2a+r+h= 18$

We are asked to find the price of "Shana", or $s+h+2a+n$. We notice that this expression has no $b$ or $y$, so we subtract the first equation from the second to eliminate those variables:



Which we substitute into the third equation



This matches the expression we need to solve for, so we are done. $\boxed{14}$.

Slick Solution

BRYAN, SARAH is an anagram of BARRY, SHANA. Let SHANA be $x$. So we have the following equation: \[21+18=25+x\rightarrow \boxed{x=14}\]


See also

2014 UNM-PNM Contest II (ProblemsAnswer KeyResources)
Preceded by
First question
Followed by
Problem 2
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All UNM-PNM Problems and Solutions
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