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        riddles >> easy >> Hour glasses
        
(Message started by: Jen13313 on Oct 12^th, 2004, 6:02pm)

Title: Hour glasses
Post by Jen13313 on Oct 12^th, 2004, 6:02pm

TEXT
Hour Glasses:
you use the 11 minute one then count the next four minutes for yourself!!

Title: Re: Hour glasses
Post by Mayank on Oct 13^th, 2004, 9:10am

The answer: (dont know if this has been posted before)(was too easy, so it must have been posted)

Lets call 7min hourglass as A and 11 mins Hourglass as B

1. Flip A and B to start the time count on both Hourglasses.
2. After 7 mins A will be over, flip it.
3. After 11 mins B will be over an A would have rerun for 4 more mins.
4. Flip A again at this moment and the when its over you would have counted exactly 15 mins (7 + 4 + 4)

Title: Re: Hour glasses
Post by TenaliRaman on Oct 14^th, 2004, 11:00am

Use the search facility given and search for hourglass and u will end up with a few threads discussing this answer ...