What has 13 hearts but no other organs?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Find out the missing number in the picture attached:

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Can you find the hidden animal in the picture below?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What is the word or phrase?