Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Can you make four (4) nines (9) equal 100?

In the image given, you can find several triangles. Can you count them all?

Out of three Friends John, Jacob and Jonny one of them is a king, one is a bureaucrat, and one is a Spy.

The king always tells the truth, the bureaucrat always lies, and the Spy can either lie or tell the truth.

John says: Jonny is a bureaucrat
Jacob says: John is a king
Jonny says: I am a Spy

Tell me, Who is the king, who is the bureaucrat, and who is the Spy?

What always comes into a house through the keyhole?

Identify the next two numbers in this series.

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

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?