You are given a mathematical question described with an open-ended vocabulary. Questions in this task involve real-world situations, describing a mathematical problem. You are also given 4 or 5 answer options (associated with "A", "B", "C", "D", "E"). Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. LaTeX mathematical format (the standard way to express mathematical expressions in the typesetting software known as LaTeX) is used to express equations. Each question is solvable with high school math knowledge. Give only one answer for each question.

Q: At a basketball tournament involving 8 teams, each team played 4 games with each of the other teams. How many games were played at this tournament?
(A)64 (B)98 (C)112 (D)128 (E)224

A: C
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Q: At Essex High School 100 students are taking chemistry and 80 students are taking are biology. If 20 students are taking both chemistry and biology, what is the ratio of the number of students taking only chemistry to the number taking only biology?
(A)\(\frac { 3 } { 4 } \) (B)\(\frac { 4 } { 5 } \) (C)\(\frac { 1 } { 1 } \) (D)\(\frac { 5 } { 4 } \) (E)\(\frac { 4 } { 3 } \)

A: E
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Q: Thirty years ago, Mr. and Mrs. Lopez purchased a house. On average, the value of the house has doubled every 6 years. If the house is worth \$320,000 today, what did they pay for it 30 years ago?
(A)\$5,000 (B)\$10,000 (C)\$64,000 (D)\$160,000 (E)\(\$320,000 \times 2^5\)

A:
B
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