Math Mania 2003

  1. A circle and a parabola are drawn in the plane. What is the largest number of regions they divide the plane into?
  2. From a group of boys and girls, 15 girls leave. There are then two boys for each girl. After this, 45 boys leave. There are then 5 girls for each boy. What was the number of girls originally present?
  3. What is the smallest positive integer x such that 750 x is a perfect square?
  4. At 2:15, what is the angle between the hour hand and the minute hand of a clock?
  5. The large square shown has area 1. The four interior lines each join a vertex of the square to the midpoint of a side as shown. What is the area of the small central square?
  6. Solve the equation x2 + x - 8 = |x|.
  7. What is the number of digits in 20032003?

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