About this game
Prime or composite? Decide fast. Watch out for sneaky odd composites like 51, 57, and 91. A wrong answer shows you a factor pair.
How to play
Click Prime or Composite, or press 1 or 2. You have 60 seconds.
Made by MathAdvice.
Prime or composite? Decide fast. Watch out for sneaky odd composites like 51, 57, and 91. A wrong answer shows you a factor pair.
Click Prime or Composite, or press 1 or 2. You have 60 seconds.
Made by MathAdvice.