Can you make four (4) nines (9) equal 100?

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

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Forwards I am heavy, backward I am not. What am I?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

I taste better than I can smell. Who am I?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?