Assn for Computing Machinery

Need a break? Think over our latest #ACMCoffeeBreakPuzzle and leave your answers in the comments. 👇

How many times does the minute hand cross the hour hand on a clock in a 24-hour cycle? We’ll tag correct solvers in stories. Check out our website for more: https://www.acm.org/education/coffee-break-puzzles #computerscience #puzzle #math #cs

Mar 13 at 2:45pmWeb
Show threadGerman VidalMar 13
@ACM It crosses 22 times. Eleven during each 12‑hour block, since the initial and final crossing are the same (i.e., you lose one crossing every 12 hours).
Show threadAssn for Computing MachineryMar 19
@the_heruman 22 is the correct answer! Congrats and thx for participating
Show threadIncognitimMar 15
@ACM
Watching my clock to double check- will have my final answer in 6 hours and 42 minutes...