Grade 8

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

Directions: Using the whole numbers 0 to 20 no more than one time each, fill in the two-way frequency table so that chocolate has a higher relative frequency than vanilla and that 8th grade students has a lower frequency than 7th grade students. Source: Eric Zuercher

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

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box so that there are infinitely many solutions. Source: Jordan Dodge

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to find three points on the same line and the slope. Source: Maggie Lee McHugh

Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to create a true equation. Source: Jos Bertemes

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create the largest (or smallest) sum possible. Source: Annie DeAngelo

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 0 to 9, at most one time each, place a digit in each box to create a result with the greatest exponent. Source: Kjersti Oliver

Directions: In triangle ABC, angle ABC is obtuse. Using the digits 1 to 9 at most one time each, place a digit in each box to make angle ACB the smallest possible acute angle. Source: Jay Sydow