Time Measurement Riddle

After quite a few days I am posting a riddle. I assure you it’s very interesting. Though it may seem a little difficult when you first read it, maintain your cool and ponder over it again.

Suppose you have ten threads and a lighter. If a thread is lighted, it will burn for exactly one hour. The threads do not burn at constant speed, in other words it can happen that the first half of the thread is burned in 15 minutes, while the remaining part will take three quarters. How can you measure exactly 45 minutes using these threads, and what is the minimum of threads you need for this?

If you need any clarification, leave your queries as comment.

Leave your asnwers below as comments.

Try your hand at another interesting time keeping puzzle

11 Comments
  1. Kumar Rahul
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