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?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

Why is Saturday stronger than Monday?

Imagine you are in a room with no windows or doors. How will you get out?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?