Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Which is faster, Heat or Cold ? Explain.

What has no start, end, or centre?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

What seven-letter word has hundreds of letters in it?

I have branches, but no fruit, trunk or leaves. What am I?

It is always ahead of me yet I can never see it. What is it?