Which part of London exists in France as well ?

What Time Should the last watch show in the below figure?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Why is the Hole below a Lock?

Can you spot the hidden girl in the picture below?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

What occurs twice in a week, once in a year but never in a day?

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

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?