(solution provided at the bottom of this post)
this is a logical puzzle that struck me when i was waiting at one of those traffic signals which take inordinately long to turn green!
some of the signals mercifully have a digital counter which counts down the seconds between the signal color changes. and as i watched, i noticed that one of the digital digits was showing me a weird set of numerals as it was counting down. it was obviously because one of the 7 (3 horizontal and 4 vertical lines) lines of the figure 8 was not working.
this got me thinking up this particular problem -
which of the 7 lines of the figure 8, if it was not working, would still cause the counter to display the longest sequence of valid numerals, albeit not in logical order? (irrespective of whether the counter was counting up or down)
1. top horizontal
2. middle horizontal
3. bottom horizontal
4. top-left vertical
5. bottom-left vertical
6. top-right vertical
7. bottom-right vertical
also list the sequence of valid numerals.
(p.s. you can send in your answers as comments or by email. the contest closes at 12 mid-night IST on 14th sept 2008)
p.s. in case you like such logical puzzles, click here to check out the previous one!
quite a few people got the answer correctly... though some of them interpreted the problem a little differently...
the correct answer is option 5, the bottom-left vertical segment.
if this segment is defective then the longest sequence of valid numerals that result are - 3, 4, 5, 5 (instead of 6), 7, 9 (instead of 8) and 9!
i have posted all the comments received so far! manasi (http://forevermanasi.blogspot.com/) was the first respondent with the correct answer! :)