Unit Fractions: Terminating, Repeating, or NeverEnding?
Consider the unit fraction 1/n, for n 50. What patterns do you notice in the decimal form of these unit fractions? What do you notice about the terminating decimals? The repeating decimals? The decimals that repeat after a delay? Using a spreadsheet may help in your investigations.

Extensions 
Which unit fraction (for n 50) has the decimal expansion of longest period?
Dividing by zero: Why can't the denominator of a fraction be zero?
Submit your idea for an investigation to InterMath.
