What always comes into a house through the keyhole?

Identify the 10 differences between the two given pictures.

Can you count the number of lines in the below picture?

What does the below rebus riddle means?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

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

People make me, save me, change me, raise me. What am I?