Working alone, Holmes puts two coats of paint on a wall, one before lunch and one after lunch. One day, Holmes began at the usual time, and two hours before lunch he was joined by Watson, who paints at the rate of 600 square meters per day, and who left when they finished the first coat. Holmes promptly began the second coat, and then he broke for lunch at the usual time. One hour before his normal quitting time, Holmes had painted a second coat everywhere except where Watson had painted that morning. If each man works at a constant rate, what was the area of the wall, in square meters?Have at it, if you dare.
13 August 2008
One of the cool things about my job is that once in a while, my boss will throw some sort of ridiculous brain teaser my way, just to keep me sharp. I was digging through some old stuff because I recently switched offices (movin' on up...) and found this one, which I remembered thinking about for days before solving it drunk on over-sized mudslides at a Dallas BBQ. So I looked at it again, and for the life of me couldn't remember where to start for another day. This shit is hard.
Posted by Mike McClenathan at 00:11