Directions: If possible, find the radius of a circle where the area of the circle and the circumference of the circle are equal. Is there more than one possible answer? Source: Karen Bloom

Directions:  How many numbers are between 1 and 3? Source:  Robert Kaplinsky

Directions: Find at least 3 possible measures for the height and the radius of a cylinder with a lateral area of 144pi square centimeters. Which of your dimensions will give you the largest volume? Source: Jason Miller

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

Directions: Using the digits 1 to 6, at most one time each, fill in the boxes make the greatest or least value. Extension: How close to 1 can you get? Source: Erick Lee

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create two equivalent expressions. Source: Will Case

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create two equivalent expressions. Source: Will Case

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create two expressions that are equivalent to one another. Source: Will Case

Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to create a quadratic in factored form with the lowest minimum. Source: Ryan Kimes

Directions: Using digits 1-9, write an equation of a line in standard form with given x- and y-intercepts. Each number can only be used at most once. Source: Andy Schwen