The Number System

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

Directions: Using the integers -3 to 3, at most one time each, place an integer in each box to make both equations true. Source: Jeanmarie Mullen

Directions: Using the digits 1 to 6, at most one time each, place a digit in each box so that top two equations are equal and the bottom equation has a greatest value than the other two. Source: Kate Nerdypoo

Directions: Find three fractions whose product is -5/24. You may use fractions between -8/9 to 8/9 no more than one time each. Find at least 2 possible combinations. Source: Al Oz

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the equation true. Source: Daniel Luevanos

Directions: Using the integers -5 to 5, at most one time each, write an expression that will have the greatest (or least) absolute value. Source: Michael Wiernicki

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

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the statement true. Source: Bryan Anderson

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the equality true. Source: Bryan Anderson

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box so that the fraction equals the decimal. Source: Robert Kaplinsky