Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

How many sides does a circle have?

What building has the most stories?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

I am quite hot but become too cold if you remove the first two letters. What am I?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Can you identify the hidden rebus in the image below?

If an electric train is travelling south, then which way is the smoke going?