Well now, those were some hard remarks you've all made. 25 kudos for the 4 letter word, and no vulgarity. There's not many possibilities available as I go down the list. Good Luck ya'll!!!
Your on the track for a goal. This could be slang as when I was much younger I don't recall it being used. I'll look it up. Hold up. 4 letters...... Okay we're all good and its in the dictionary not regarded as slang.
The ages of Ann and Bill now add up to 91. Ann is now three times as old as Bill was at the time when Ann was twice as old as Bill is now. How old are and and Bill now?
In case I wasn't clear earlier, The OP ONLY uses the word" observed" in a visual context only. Not written or other ways.NEVER LOOKED AT.with eyes>NO PAPER.