Which tank will fill first?

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.

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

What happened when the wheel was invented?

Can you find the key in the picture below?

Find the last number in the series below:

voN luJ yaM raM ---

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?