The document contains 8 math problems from a university entrance exam in Brazil (Fuvest). Problem 1 involves finding the possible values of x in an arithmetic progression and calculating the sum of the first 100 terms using the smallest value of x. Problem 2 involves graphing a piecewise defined function f over several intervals, finding the area under the graph over two intervals, and determining the value of f(4). Problem 3 involves counting the number of ways to separate 16 children into 4 groups under certain constraints and calculating a probability involving the chances of boys and girls winning a tournament. The remaining problems involve calculating volumes, lengths, areas, polynomials, and trigonometric functions.