It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

The King of a distant land had heard that Birbal was one of the wisest men in the East and so desired to meet Birbal. He sent Birbal an invitation to visit his country.

In due course, Birbal arrived in the distant kingdom. When he entered the palace he was flabbergasted to find not one but six kings seated there. All looked alike. All were dressed in kingly robes. Who was the real king?

The very next moment he got his answer. Confidently, he approached the king and bowed to him.

How did Birbal know who was the real king?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

Count the number of squares in the picture below.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

Solve the following series:
AZ, GT, MN, __, YB

I taste better than I can smell. Who am I?