There is no magic idea count. A smaller set of distinct, relevant ideas is better than continuing until the brainstorm becomes repetitive.

In many interviews, three to five solid ideas across a few logical categories is enough to demonstrate breadth, especially if you can prioritize them afterward.

If the interviewer asks you to keep going, add another angle rather than producing weaker variations of the same idea.

Practice stopping after a coherent first set and saying which one or two ideas you would test first. That turns brainstorming from a quantity exercise into decision-oriented thinking. Use one concrete example to make the point easier to believe and easier to remember. Keep the answer anchored in the actual decision rather than trying to satisfy an imagined recruiter rule.

Three strong ideas can beat ten generic ones.

Do interviewers usually ask you to keep going if they want more breadth?