Time Twister

Directions: Using the digits 0 to 9, at most one time each, create three different times on the clocks where the span of the times are between 12 noon and 7 pm. How can you make the difference between the times the greatest? closest times together? Source: Jason Kornoely

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Adding Products

Directions: Old Mother Hubbard is baking cookies so her cupboards won’t be bare anymore! She bakes 109 cookies in all. She bakes the cookies on 4 cookie sheets. Each cookie sheet is arranged into equal rows and columns, but not every cookie sheet has the same number of rows and columns. Using digits 0-9, at most once, how might the …

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Equations of Perpendicular Lines

Directions: Using the integers -9 to 9 (excluding 0) at most one time each, fill in the blanks to create two distinct perpendicular lines. Source: Louise Pepper with answers from the students of Kings College Alicante, Spain

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Multiplying Fractions 4

Directions: Using the digits 1 to 9 at most once each time, fill the boxes to make the greatest possible product. Source: Marc DeArmond

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Scientific Notation 2

Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to make a product that equals 800,000,000. Source: Robert Kaplinsky

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Prime Factorization 2

Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make the greatest possible product. Source: Robert Kaplinsky

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Fraction of an Amount

Directions: Using the digits from 1 to 9, at most once, make as many true statements as possible. Source: Rochelle Telfer

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Equivalent Exponents

Directions: Using the digits 0-9 only once each, create as many true equations as possible. Source: Annie DeAngelo and Maeve O’Connell

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