Many intelligent and well-educated people mistakenly believe that asking questions makes them somehow look less intelligent. Ironically the tendency to avoid asking questions actually reduces your ability to learn.
When a closed ended question is asked, the response that is being looked for is often a “Yes” or a “No.” But when a closed ended question is asked and somebody starts to speak and does not immediately respond to the actual closed question, the real answer is almost always, “No.”
“Know your numbers” refers to what we call R1 and R2. R1 refers to “Results” in a defined base period against which improvement can be measured. R2 refers to the actual “Required Results” you are trying to achieve.