Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to create two numbers that both round to 5 and have the greatest (or least) possible difference with 5. Source: Mike Wiernicki

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: The perimeter of a triangle is 20 units. Using whole numbers, how many sets of side lengths can you find for this triangle? Source: Christina Ploeckelman