Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

What type of tree can I carry in my hand?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Take one out and scratch my head, I am now black but once was red. What am I?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Why is the Hole below a Lock?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?