4

Nice. What would you like to do with the number 4? Here are some quick options. Pick one or tell me your own:

• Practice problems that have 4 as the answer (I’ll give you problems and show the solutions). Example: Solve 3x − 8 = 4 → x = 4
• Solve a problem you have and I’ll aim to get 4 as the answer (paste the problem).
• Quick review of 4 as a mathematical object:
  • 4 = 2^2, a perfect square
  • Even, composite
  • Smallest non-prime power of 2
  • Examples of equations with solution x = 4, e.g., 2x = 8, |x| = 4, 3x − 8 = 4
• Generate a short set of practice questions on a topic (algebra, calculus basics, statistics) where the answer is 4.

Tell me which option you prefer, or share the problem you’re working on.