Grade 5

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to make the smallest possible decimal sum. Source: Kari Frazier

Directions: Using the digits 1 through 9 at most one time each, fill in the boxes to create a rectangular prism with a volume that is greater than 100 cubic units. What’s the least volume? What’s the greatest volume? Source: Kari Frazier

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to create a rectangular prism with a volume that is less than 100 cubic units. What’s the least volume? What’s the greatest volume? Source: Kari Frazier

Directions: Using the digits 0 to 9 at most one time each and choosing either multiplication/division or addition/subtraction, place a digit in each box to make a true statement. Source: Brian Errey

Directions: Using the digits 1 to 9 at most one time each, find the dimensions of three rectangular prisms so that their volumes are as close as possible. Note: diagram may not be drawn to scale. Source: Daniel Walker

Directions: Using the digits 1 through 9, at most one time each, place a digit in each box to create two rectangular prisms where the larger one has the greatest possible volume and is double the volume of the other. Source: Joe Schwartz and Robert Kaplinsky

Directions: Using the digits 1 through 9, at most one time each, place a digit in each box to create an equation with the greatest possible quotient. Source: Robert Kaplinsky

Directions: Using the digits 1 through 9, at most one time each, place a digit in each box to create two true equations: one where the quotient is greater than 40 and one where it’s less than 40. You may reuse the same digits for each of the equations. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9 at most one time each, place a digit in each box to make a product that’s as close to 4/11 as possible. Source: Robert Kaplinsky

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