Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes to make two fractions that have a quotient that is as close to 4/11 as possible. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9, at most one time each, create an equation where x has the smallest (or greatest) possible value. Source: Daniel Luevanos

Directions: Using the digits 1 to 9, at most one time each, create an equation where x has a positive (or negative) value. Source: Daniel Luevanos

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to find the function’s greatest possible value. Source: Robert Kaplinsky

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes and make two true number sentences. Source: Robert Kaplinsky

Directions: Use the integers -9 to 9, at most one time each, to fill in the boxes and make a real number product with the greatest value. Source: Robert Kaplinsky

Directions: Use the integers -9 to 9 at most one time each, place an integer in each box to make a positive real number product and then repeat the process to make a negative real number product. You may use all the integers each time. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to fill in the circles of the triangle. The sum of the numbers on each side of the triangle is equal to the length of that side. Arrange the numbers so that the triangle is an equilateral triangle. Source: Erick Lee

Directions: Fill each blank with a different integer such that the point (4,4) is within the solution region created by the constraints. Source: Erick Lee

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to complete the statement below. Source: Andy Schwen