algebra 2 problem.. help?

Mehmet · Post by **Mehmet** » Tue Oct 08, 2002 10:47 pm

a watchmaker repaired a watch only to switch the hour and minute hands. when the customer came to pick up the watch, it correctly showed 2 o'clock. When is the next time the watch will show the correct time?

littletechgirl · Post by **littletechgirl** » Tue Oct 08, 2002 11:09 pm

If it is not military time which it could not be (otherwise this problem could not be) and when the customer came in it said 2:00 on the hour exactly then never it will always be 12 hours ahead. or the answer would be the next time they take the watch in to be repaired.

I think this is a trick question.....lol

this is not an algebra question this is a riddle...lol

terrancelam · Post by **terrancelam** » Tue Oct 08, 2002 11:12 pm

Givens:
2:00pm set time,
Minute hand switched with Hour hand,
(Thus for every passed hour, the watch actually only moves by 5 minute increments),
1 hour = 60 minutes,
24 hours = 1 day,

littletechgirl · Post by **littletechgirl** » Tue Oct 08, 2002 11:15 pm

But in 24 hours it will be 2 o'clock again and as stated in the question that is the correct time BUT it was changed by the watch repair guy to that time.

But it says even though he switched the hands "it still read the correct time." so....if it has the right time what is the problem?

TEH WIN · Post by **TEH WIN** » Tue Oct 08, 2002 11:15 pm

1 hour = 5 minutes

60 minutes = 12 hours

thats... as far as i can figure it out, lol

Mehmet · Post by **Mehmet** » Tue Oct 08, 2002 11:34 pm

heres what i narrowed it down to:

alright so, the actual time at 2:00, is 12:10. which is a difference of 1:50.. now, in order for it to display the correct time, (which means looks right, but isnt really what tim it is) it has to be 3:05 on the fake clock and 1:15 on the real time.. which is also a difference of 1:50..

what ya guys think?

brembo · Post by **brembo** » Tue Oct 08, 2002 11:43 pm

If I understand, I think...not sure, but the smallest common denominator is gonna be 1/12th of a "time unit". So, 2 hours. The minute hand will have moved to the 4 o'clock position and the hour hand will be at 12 'o clock.....4 o'clock. I think thats right.

Oh hell no thats not right...dang it.....

Post by **Philip** » Wed Oct 09, 2002 12:00 am

for every hour that passes, it's going to look like 5 minutes have passed on the "new" clock (although the hour hand will move a full circle in between)...

It is going to look correct every 65 minutes, imho (3:05, 4:10, 5:15, etc.). Now you "only" have to do the math and prove it

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algebra 2 problem.. help?

algebra 2 problem.. help?

Is this a trick question?

We narrowed it down to this