Brain Teasers
Room Lit by Clock
A room is lit only by an LED digital 12-hour clock. At what time is the room the brightest? The darkest?
Assume no leading '0' in times where the hour is a single digit. In other words, the time is displayed as "6:32", not "06:32".
Assume no leading '0' in times where the hour is a single digit. In other words, the time is displayed as "6:32", not "06:32".
Hint
The digit zero lights six segments, while the digit two lights only five. Therefore, "12" is darker than "10".Answer
Brightest: 10:08 (am or pm)Darkest: 1:11 (am or pm)
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Comments
w0w ... nice idea behind that teaser n.n; i thot it was 100 but i wasnt thinkin that well x.x;
-tangerine-
-tangerine-
I'm dense...I dont get it
If the clock displays military time then it's a tie between 228 and 238.
Actually, in military time, 208 would be brighter still.
On most LED clocks there's an AM/PM indicator. The room would be brightest at 108 when that LED is on.
Nice teaser Mr Tuba! Great idea.
hush up. its a good teaser.
Good Teaser, I once figured that out when i was i think 7, but i had no idea how to submit it as a teaser. Good job
Apr 05, 2003
very cleaver
Great teaser!
and ppl think 1010 is the brightest smiley face...
on 2nd thought, mb at 1008 it's too bright they can't see
mabushisugi kamo ne...
on 2nd thought, mb at 1008 it's too bright they can't see
mabushisugi kamo ne...
itd be brightest at 1008 AM cuz the sun's up
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