"I rate my problem-solving skills as an 8/10. I will occasionally have times when I am not as efficient as I would like to be, but I do feel that my problem-solving skills are above average. My supervisor and coworkers will attest to my fast reflexes when a problem arises, and they would also say that I remain calm under pressure."

"I get a solid 8.3 on a scale of 10. It seems weird to give myself something like a .3, but I think of it as an 83%, which is a B- teetering on a solid B. It's a solid grade, with definite room for improvement since I'm certainly not perfect. The reason for the B-/B grade would be that I'm quick to take action and figure out the solution as I go, but sometimes I could benefit from taking a moment to pause and reflect or gather other contributors before taking action. That said, I believe I generally get the best outcome possible when faced with a challenge."

While you want to leave room for improvement and not rate yourself a "10", you also do not want to give yourself a score lower than an "8". If you rate yourself too low, the interviewer may question your ability to handle problems in the workplace.