Directions: Using the digits 1-9, fill in the blanks to make a whole number sum. Use each digit only at most one time. Can you make all whole numbers from 1 to 9? Source: Owen Kaplinsky

Directions: Use four of these dominoes to form a square with the same number of dots on each side. Source: Joshua Nelson

Directions: Use four of these dominoes to form a square with the same number of dots on each side. Source: Joshua Nelson

Directions: Using the digits 1 through 9 only one time each, fill in the blanks to make true statements. For the fraction less than 1/2, try to make the greatest number possible. For the fraction greater than 1/2, try to make the least number possible. Source: Alyson Eaglen

Directions: Using the digits 1 through 9 fill in the blanks to make a product of 1. Source: Owen Kaplinsky

Directions: Using each of the digits from 0-9 only once, fill in the boxes to make the equation true. Source: Denise White

Directions: Arrange the digits 1-6 into two 3-digit whole numbers. Make the sum as close to 1000 as possible. Source: Ian Kerr

Directions: Using the digits 0-9 at most once, fill in the boxes to make the largest possible greatest common factor. Source: Howie Hua

Directions: Using the digits 0-9 at most once, fill in the boxes to make the smallest possible least common multiple. Source: Howie Hua

Directions: Using the digits 0-9 at most once, fill in the boxes to make the largest possible greatest common factor. Source: Howie Hua