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?

What can you hold in your right hand, but never in your left hand?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Why are all black people so quick ?

One day, all the courtiers from Akbar's court were gathered in the assembly hall when one of them told the Emperor that all his valuables had been stolen by a thief the previous night.
This shocked the Emperor to his core as the place where that courter stayed was the most secured in the kingdom. The Emperor thought that it is not at all possible for an outsider to enter into the courtier's house and steal the valuables. Only another courtier could commit this crime. He quickly called Birbal to identify the thief.
Birbal thought for a while and successfully solved the mystery by identifying the thief in just one statement.
What did Birbal say?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?