Art of Problem Solving

1990 AJHSME Problems/Problem 10: Difference between revisions

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On this monthly calendar, the date behind one of the letters is added to the date behind <math>\text{C}</math>.  If this sum equals the sum of the dates behind <math>\text{A}</math> and <math>\text{B}</math>, then the letter is


<asy>
unitsize(12);
draw((1,1)--(23,1));
draw((0,5)--(23,5));
draw((0,9)--(23,9));
draw((0,13)--(23,13));
for(int a=0; a<6; ++a)
{
  draw((4a+2,0)--(4a+2,14));
}
label("Tues.",(4,14),N); label("Wed.",(8,14),N); label("Thurs.",(12,14),N);
label("Fri.",(16,14),N); label("Sat.",(20,14),N);
label("C",(12,10.3),N); label("$\textbf{A}$",(16,10.3),N); label("Q",(12,6.3),N);
label("S",(4,2.3),N); label("$\textbf{B}$",(8,2.3),N); label("P",(12,2.3),N);
label("T",(16,2.3),N); label("R",(20,2.3),N);
</asy>
<math>\text{(A)}\ \text{P} \qquad \text{(B)}\ \text{Q} \qquad \text{(C)}\ \text{R} \qquad \text{(D)}\ \text{S} \qquad \text{(E)}\ \text{T}</math>

Revision as of 09:44, 8 September 2019

On this monthly calendar, the date behind one of the letters is added to the date behind $\text{C}$. If this sum equals the sum of the dates behind $\text{A}$ and $\text{B}$, then the letter is

[asy] unitsize(12); draw((1,1)--(23,1)); draw((0,5)--(23,5)); draw((0,9)--(23,9)); draw((0,13)--(23,13)); for(int a=0; a<6; ++a)  {   draw((4a+2,0)--(4a+2,14));  } label("Tues.",(4,14),N); label("Wed.",(8,14),N); label("Thurs.",(12,14),N); label("Fri.",(16,14),N); label("Sat.",(20,14),N); label("C",(12,10.3),N); label("$\textbf{A}$",(16,10.3),N); label("Q",(12,6.3),N); label("S",(4,2.3),N); label("$\textbf{B}$",(8,2.3),N); label("P",(12,2.3),N); label("T",(16,2.3),N); label("R",(20,2.3),N); [/asy]

$\text{(A)}\ \text{P} \qquad \text{(B)}\ \text{Q} \qquad \text{(C)}\ \text{R} \qquad \text{(D)}\ \text{S} \qquad \text{(E)}\ \text{T}$