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Robert Kaplinsky

Make the Biggest Circle

Directions: Using the digits 1 to 9 as many times as you want, fill in the boxes to make the biggest circle: Source: Robert Kaplinsky

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Which Quadrilateral Has A Greater Area?

Directions: Which quadrilateral has a greater area? Quadrilateral A has its perimeter equal to 44 units.  Quadrilateral B has the sum of its interior angles equal to 360 degrees. Source: Robert Kaplinsky

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Squares: Perimeter v. Area

Directions: How can you tell which square is bigger: a square with a perimeter of 25 units or a square with an area of 25 square units? Source: Robert Kaplinsky

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Rectangles: Perimeter v. Area

Directions: How can you tell which rectangle is bigger: a rectangle with a perimeter of 24 units or a rectangle with an area of 24 square units? Source: Robert Kaplinsky

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Multiplying Mixed Numbers

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the smallest (or largest) product. Source: Robert Kaplinsky

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