Directions: Using the integers -9 to 9 at most one time each, fill in the boxes to create an equation where each side has the greatest possible value. Source: Robert Kaplinsky

Directions: Using the integers -9 to 9 at most one time each, fill in the boxes to create two equations. You may reuse all the integers for each equation. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to create a unit rate with the greatest possible value. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to create two unit rates. You may reuse all the digits each equation. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to create the least expensive item after discount. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to create two true statements without rounding. You may reuse all the digits for each statement. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make an equivalent ratio. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make an equivalent ratio with a unit rate that has greatest possible value. Source: Robert Kaplinsky

Directions: Create a set of five positive integers from 1 to 20 so that the values of their mean, median, and range are the same and have the greatest possible value. Source: Eric Berchtold, Melissa Minnix, and Robert Kaplinsky

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make an equation where both sides have the greatest possible value. Source: Adrianne Burns and Robert Kaplinsky