The Number System

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make both equations true. Source: Kate Nerdypoo

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create 3 rational and 2 irrational numbers. Source: Jennifer Kolis

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the greatest possible irrational number. Source: Robert Kaplinsky

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the statement true. Source: Robert Kaplinsky

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the following expression as close to 0 as possible. Source: Erick Lee

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create expressions that produce one rational root and three irrational roots. Source: Norma Gordon

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create expressions that produce two rational roots and two irrational roots. Source: Norma Gordon

Directions: Using the digits 1 to 9, find one pair of digits to fill in the boxes to create expressions that produce one rational root and three irrational roots. Source: Norma Gordon

Directions: Using the digits 2 to 9, at most one time each, place a digit in each box to create expressions that produce two rational roots and two irrational roots. Source: Norma Gordon

Directions: Using the digits 2 to 9, at most one time each, place a digit in each box to create expressions that produce one rational root and three irrational roost. Source: Norma Gordon