It's an old Chinese proverb found in many books of quotations.
An analog clock is correct twice a day (AM and PM display the same times). A military clock (0000 to 2400 hours) is only correct once.
Twice. Once in the am, once in the pm.
twice if you're looking for exact right angles
Twice.
Twice in a 24 hour cycle at 3:00.
a broken clock is right at least twice a day
Twice a day.
An analog clock is correct twice a day (AM and PM display the same times). A military clock (0000 to 2400 hours) is only correct once.
That would depend on what kind of clock, and how "broken" it is. For example, a broken LCD digital clock could have a bad power switch and might be entirely blank - so it would NEVER be 'right". There's an old saying that "a STOPPED clock is right twice a day" - which assumes that the clock is analog, and that the hands are stopped. It could be "broken" by being too fast or two slow, in which case it might be correct only a few times per month.
A broken clock is correct twice a day. This is because a clock with hands that are stuck will still display the correct time at least twice a day when the hour and minute hands align with the correct time.
Twice. Once in the am, once in the pm.
Oh, dude, that phrase is like saying even someone who's totally clueless might stumble upon the right answer sometimes. It's like a blind squirrel randomly finding a nut in the forest - pure luck! So, basically, even if you have no idea what you're doing, you might accidentally get something right once in a while.
The first clock is right twice per day. The other wont be right for years. (However, neither clock could be said to be 'efficient!'.)
twice if you're looking for exact right angles
The red clock is more accurate because even though it is broken and doesn't run, it is showing the correct time twice a day. The blue clock loses one second every 24 hours, making it gradually fall out of sync with the correct time.
Twice.
Twice in a 24 hour cycle at 3:00.