Grade 6

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make two different pairs of fractions that have a quotient of 2/3. Source: Robert Kaplinsky in Open Middle Math

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the inequality true. Source: Robert Millett

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the statement true. (Note: Image is not to scale) Source: Owen Kaplinsky

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the greatest possible product. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make as many true statements as possible. Source: Rochelle Telfer

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to create as many true equations as possible. Source: Annie DeAngelo and Maeve O’Connell

Directions: Using the digits 1 to 5, at most one time each, place a digit in each box to create an expression with the largest possible value. Source: Matt Donahue

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the largest possible greatest common factor. Source: Howie Hua

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the smallest possible least common multiple. Source: Howie Hua

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the largest possible greatest common factor. Source: Howie Hua