Why do we preferably have round manhole covers and not square ones?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Which part of London exists in France as well ?

I can write cow in 13 letters.

Can You?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

Solve the rebus riddle in the picture below.

When we see 2 but call 10?

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.

When does a USA Potato change its nationality?