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Prashant Saha

Fraction Quotient Closest to 4/11

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes to make two fractions that have a quotient that is as close to 4/11 as possible. Source: Robert Kaplinsky

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Sine Functions 2

Directions: Use the digits 1 to 9, at most one time each, to find the function’s greatest possible value. Source: Robert Kaplinsky

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Sine Functions

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes and make two true number sentences. Source: Robert Kaplinsky

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Complex Number Products

Directions: Use the integers -9 to 9, at most one time each, to fill in the boxes twice: once to make a positive real number product and once to make a negative real number product. Source: Robert Kaplinsky

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Equilateral Triangle

Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to fill in the circles of the triangle. The sum of the numbers on each side of the triangle is equal to the length of that side. Arrange the numbers so that the triangle is an equilateral triangle. Source: Erick Lee

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System of Inequalities

Directions: Fill each blank with a different integer such that the point (4,4) is within the solution region created by the constraints. Source: Erick Lee

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