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# High School: Number and Quantity

Directions: Using the digits 0-9 at most one time each, make both of these equations true. Source: Jonathan Newman

## Complex Number Products (Greatest Value)

Directions: Use the integers -9 to 9, at most one time each, to fill in the boxes and make a real number product with the greatest value. Source: Robert Kaplinsky

## 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

## Factoring Complex Numbers

Directions: Find Integers a,b,c,d such that: Source: Bryan Anderson

## Matrix Multiplication

Directions: Using the digits 1-9, each only once, fill in the blanks to create the smallest possible value for a. Source: Bryan Anderson

## Rational Exponents

Directions:  Fill in the boxes using the whole numbers 1 through 6 to make the largest (or smallest) possible number. Use each digit at most once. Extension: How close to 1 can you get? Source:  Erick Lee