4

I’m not sure what you mean by “4.” Do you want:

• me to solve Question 4 from a set (please paste the full problem),
• a new practice problem whose answer is 4,
• a short 4-question quiz (in a subject of your choice),
• or a quick explanation about a topic where the number 4 is relevant (e.g., quartic equations, 4x4 matrices, etc.)?

Tell me your subject and level, and I’ll tailor the help. If you want, I can start with a 4-question quick quiz right now.