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.

At a certain restaurant, there are 25 tables and each table has either 2 or 4 chairs. If there is a total of 86 chairs accompanying the 25 tables, how many tables have exactly 4 chairs?
(A)9 (B)12 (C)15 (D)18 (E)21
D

In a certain game, words earn points based on the letters in each word. The letters a, s, and k are each worth 8 points, and all other letters are worth 2 points each. How many points would the word "sandblaster" earn in this game?
(A)10 (B)22 (C)28 (D)38 (E)46
E

Marty has now \(m\) more marbles than Jane has. After he gives \(n\) marbles too Jane, how many more marbles will Jane have than Marty?
(A)\(m\) (B)\(n + m\) (C)\(2n - m\) (D)\(3n - 2m\) (E)\(m - n\)

C