Why is a river so rich ?

Find the next number in the series.
1 10 24 43 67 ?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Buy me, smell me or deliver me, I do not change.

Who am I?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Can you make a fire with just a single stick?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

what does the below rebus means?